(I think this is the actual comprehensive speedrunning guide. Emulator speedups are very useful!)

Card	Cost	ATK	DEF	Alignment	Effect
Armored Zombie	15	1500	0	Fiend	None
Dancing Elf	5	300	200	Forest	None
Bear Trap	3				Trap: Destroy any attacking monster with <=1500 ATK
Invisible Wire	5				Trap: Destroy any attacking monster with <=2000 ATK
Acid Trap Hole	10				Trap: Destroy any attacking monster with <=3000 ATK
Kuriboh	5	300	200	Shadow	None
Fiend's Hand	12	600	600	Fiend	Sacrifices itself to destroy opponent's strongest monster
Hourglass of Life	13	700	600	Light	Powers up all your monsters by 500 ATK/DEF
Skelengel	13	900	400	Light	Draw 1 card from your deck
Dragon Zombie	16	1600	0	Fiend	None
Jirai Gumo	23	2200	100	Forest	None
7 Colored Fish	26	1800	800	Aqua	None
Giant Red Seasnake	26	1800	800	Aqua	None
Dunames Dark Witch	28	1800	1050	Light	None
Dark-eyes Illusionist	0	0	0	Dreams	None
The Unhappy Maiden	1	0	100	Light	None
Dark Elf	28	2000	800	Shadow	None
Gemini Elf	28	1900	900	Light	None
Mechanicalchaser	26	1850	800	Fiend	None
Widespread Ruin	20				Trap: Destroy any attacking monster
SlenderRocket	27	2000	2000	Aqua	None
MutusChariot	23	1800	1800	Pyro	None
RootMaid	29	2000	500	Pyro	None
Aqua MageBear	24	2000	1000	Wind	None
Deep-seaRedflower	20	2000	1300	Pyro	None
Two-toneTurtle	21	2000	1000	Aqua	None
FunnyfaceTank	26	1900	900	Pyro	None
Rogue Doll	26	1600	1000	Light	None
La Jinn the Mystical Genie	28	1800	1000	Shadow	None
Battle Ox	27	1700	1000	Forest	Destroy all of opponent's Pyro monsters on field
Crush Card	50				Magic: Destroys all of opponent's 1500+ ATK monsters on field
Trap Master	16	500	1100	Shadow	Set Acid Trap Hole
Mask of Darkness	13	900	400	Shadow	None
Beautiful Headhuntress	24	1600	800	Shadow	None
Mystic Lamp	7	400	300	Shadow	None
Beastking of the Swamps	21	1000	1100	Earth	Destroy all monsters on the field (including itself)
Dragon Piper	20	200	1800	Pyro	None
Anti Raigeki	20				Trap: If opponent plays Raigeki, destroy all of opponent's monsters and not yours
Flame Ghost	18	1000	800	Pyro	None
The Bistro Butcher	28	1800	1000	Fiend	None

RESULTS (wins only; there were maybe 7 resets/losses):
1. Hourglass of Life (power-up beat 2300 Dungeon Worm)
2. None (he played 0 monsters)
3. None (he played 1 weak monster)
4. None (he played only weak monsters)
5. Dragon Piper (Pyro, so beat Jirai)
6. None
7. Dancing Elf and Mystic Lamp (fused for Dark Elf at crucial time)
8. Constructed 1900 ATK Pyro (beat Jirai)
9. Widespread Ruin (trap that destroys any attacking monster; destroyed 2700 ATK Jirai)
10. Constructed 1800 ATK Pyro (beat Jirai)
11. Trap Master (effects sets Acid Trap Hole; destroyed 2300 Monster Tamer) + 2000 ATK Pyro (beat Jirai) + Thousand-eyes Idol (beat fused Mystical Sand)
12. None (he played only weak monsters)
13. Crush Card
14. None (he played only weak monsters)
15. Dragon Piper (beat Monster Tamer and Jirai)
16. The Unhappy Maiden (beat Reflect Bounder)
17. Widespread Ruin
18. Widespread Ruin
19. Flame Ghost (Pyro, so beat Jirai)
20. Several Pyros (walled/beat Jirai)
21. Crush Card (destroyed Jirai)
22. Crush Card + constructed 2000 ATK Pyro (beat 2 Jirais)
23. None (he played weak monsters)
24. The Unhappy Maiden (beat Reflect Bounder)
25. Constructed 2000 ATK Pyro (beat Jirai)
26. Constructed 1900 ATK Pyro (beat Jirai) + Acid Trap Hole (trap that destroys <=3000 ATK attacking monster) + Skelengel (beat Wall Shadow)
27. Fiend's Hand (effect beat Jirai) + my own Jirai Gumo (big damage saved a turn at the end)
28. Crush Card
29. Constructed 2000 ATK Pyro/Flame Ghost (beat Jirai; only one was needed)
30. Flame Ghost/Crush Card (either one Jirai; only one was needed)
31. 7 Colored Fish (beat fused Flame Swordsman, a Pyro) + constructed 1800 ATK Pyro (beat Jirai)
32. Widespread Ruin + my own Jirai Gumo (had enough ATK to survive Shadow Spell drop)
33. Invisible Wire (trap that destroys <=2000 ATK attacking monster) + Acid Trap Hole + constructed 2000 ATK Pyro (beat fused Ushi Oni, a Forest)
34. Mask of Darkness (beat Guardian of the Throne Room)
35. Two Pyros/my own Jirai (beat opposing Jirai; only one was needed)
36. Constructed 1800 ATK Pyro (beat Jirai)
37. Beastking of the Swamps (cleared board at the perfect time)
38. Invisible Wire
39. Constructed 2000 ATK Pyro (beat Jirai)
40. Overall high ATK deck (barely did enough damage on turn Swords ended)
41. Trap Master
42. Acid Trap Hole
43. Trap Master
44. None (he played only weak monsters)
45. Trap Master + Dancing Elf and Mask of Darkness (fused for Dark Elf) + constructed 2000 ATK monster (barely enough to win 1 turn early)
46. Constructed 1900 ATK Pyro + Flame Ghost (beat 2 Jirais) + Trap Master
47. None (he played only weak monsters)
48. Bear Trap (trap that destroys <=1500 ATK attacking monster)
49. Beautiful Headhuntress (beat Megamorph'd Guardian of the Throne Room) + Constructed 1900 ATK Pyro (beat Jirai)
50. None (he played only weak monsters)

P. Seto (+Darkfire/Dreams/Shadow, -Rogue/Bistro/AntiRaigeki)

1. Traps and Crush Card
2. Dark Elf (beat Blue-eyes) and Crush Card
3. Masked Clown (beat Judge Man)
4. Beastking of the Swamps (cleared 2 monsters, one of which I couldn't destroy otherwise)
5. LOSS (2 Change of Heart)
6. Jirai Gumo (beat Megamorph'd Ryu-kishin Powered)
7. LOSS (Change of Heart)
8. Kuriboh (beat Megamorph'd Dunames that was taken by Change of Heart) + Dragon Piper (beat Mystic Horseman)
9. Kuriboh (beat Blue-eyes) + Fiend's Hand (destroyed fused Garvas)
10. None (he played only monsters)
11. Dragon Piper (beat Rabid Horseman)
12. 2000 ATK Pyro (beat Rabid Horseman)
13. Beastking (cleared board at crucial time) + many high ATK draws to barely do enough damage
14. LOSS (Change of Heart + Megamorph)
15. Several 2000 ATK monsters + Fiend's Hand (destroyed Megamorph'd La Jinn)
16. 1900 ATK Pyro (beat Megamorph'd Mystic Horseman)
17. LOSS (Change of Heart + fused into 2100 ATK Forest with my Darkfire Dragon + didn't have 2nd Pyro)
18. Dragon Piper (beat Mystic Horseman) + Jirai Gumo (high ATK allowed finishing 1 turn earlier)
19. Thousand-eyes Idol (beat La Jinn)
20. None (he played only weak monsters)
21. Flame Ghost/1900 ATK Pyro (only needed one; beat Megamorph'd Battle Ox)
22. Trap Master + 3 traps + Dancing Elf/Mystic Lamp (fused for Dark Elf)
23. Acid Trap Hole + Dark Elf (2000 ATK needed to beat Megamorph'd The Wicked Worm Beast)
24. Just high ATK monsters (he played his strongest monsters, but only 1 Dark Hole for magics)
25. Acid Trap Hole
26. None (he drew poorly)
27. Thousand-eyes Idol + Dark-eyes Illusionist (beat 2 La Jinns)
28. Widespread Ruin
29. Widespread Ruin
30. None (he drew poorly)
31. Traps + Dancing Elf/Kuriboh (fused for Dark Elf)
32. Trap Master + Widespread Ruin + Crush Card
33. Dark Elf (2000 ATK needed to beat Steel Ogre Grotto)
34. Widespread Ruin
35. Trap Master + Invisible Wire
36. Trap Master + Acid Trap Hole
37. Widespread Ruin
38. La Jinn (beat Blue-eyes)
39. Trap Master + Bear Trap
40. None (he played only weak monsters)
41. Crush Card
42. None (he played only monsters)
43. Trap Master
44. Trap Master + Dark Elf (2000 ATK needed to kamikaze into Swordstalker)
45. LOSS (Change of Heart + Raigeki)
46. Kuriboh (beat Blue-eyes) + high ATK monsters (finished duel quickly while low on LP)
47. 1800 ATK Pyro (beat fused Garvas, a Forest)
48. Trap Master + Beautiful Headhuntress (beat Judge Man)
49. 2000 ATK Pyro (destroyed Mystic Horseman) + 2000 ATK Aqua (needed to beat Megamorph'd The Wicked Worm Beast)
50. None (he drew poorly)

Ishizu (+Clown Zombie/Wretched Ghost/Wretched Ghost, -Darkfire/Piper/Flame Ghost)

1. LOSS (Swords into Mystical Sand + Harpie Lady Sisters)
2. None (she drew very poorly)
3. Fiend's Hand (beat Megamorph'd Dark Elf) + Battle Ox (beat Harpie Lady Sisters)
4. Mask of Darkness (beat 3 strong Light monsters)
5. Beautiful Headhuntress (beat 2 MM'd Dunames)
6. None (she did nothing except waste time with Swords)
7. 2000 ATK monsters (needed to beat Harpie Lady Sisters)
8. Trap Master
9. Trap Master
10. Kuriboh/Wretched Ghost (only needed one; beat 2 strong Light monsters)
11. Masked Clown (beat Mystical Elf)
12. Beastking of the Swamps (destroyed Performance of Sword)
13. Fiend's Hand (beat Megamorph'd Harpie Lady Sisters under Swords)
14. Masked Clown (beat Gemini Elf)
15. Acid Trap Hole
16. Traps + Kuriboh (beat Mystical Elf)
17. Trap Master + Invisible Wire
18. Mask of Darkness (beat 2 strong Light monsters)
19. Mask of Darkness (beat Megamorph'd Mystical Elf)
20. Trap Master
21. Fiend's Hand (destroyed Mystical Sand) + Trap Master (used as a regular Shadow monster to beat 2 Lights) + Acid Trap Hole
22. Widespread Ruin
23. Widespread Ruin
24. Jirai Gumo (beat Dark Elf)
25. Jirai Gumo + Dancing Elf/Mystic Lamp (fused for Dark Elf) (needed these two high ATK monsters because other draws were poor)
26. None (she drew poorly)
27. Balanced monsters (she played a variety of high-ATK elements so that I couldn't rely on one counter)
28. Jirai Gumo (beat Mystical Sand and Harpie Lady Sisters)
29. Skelengel (draw effect helped) + Dancing Elf/Wretched Ghost (fused for Dark Elf)
30. Hourglass of Life (boosted 7 Colored Fish to beat Dark Elf) + Crush Card
31. Acid Trap Hole
32. None (she drew poorly)
33. Traps + Kuriboh (beat Mystical Elf) + Battle Ox (beat Harpie Lady Sisters)
34. None (she drew very poorly)
35. Kuriboh (walled her Lights during Swords) + Jirai (also walled during Swords in ATK mode) + Dark Elf (big damage helped me win quickly after she used Dark Hole)
36. Battle Ox (beat Harpie Lady Sisters)
37. Dancing Elf (beat Harpie Lady Sisters)
38. Dark Elf (beat Mystical Elf)
39. High ATK monsters (formed a wall and eventually broke through)
40. Dancing Elf/Wretched Ghost (fused for Dark Elf -- I tried the duel without fusing and it was much worse)
41. None (she drew poorly)
42. None (she did nothing except waste time with Swords)
43. Widespread Ruin
44. Acid Trap Hole + Jirai Gumo (beat Harpie Lady Sisters) + Dancing Elf/Wretched Ghost (fused for Dark Elf)
45. Crush Card
46. None (she drew very poorly)
47. Jirai Gumo (beat Mystical Elf)
48. Wretched Ghost (beat Mystical Elf) + Trap Master + Kuriboh (beat 2 MM'd Dunames) + Thousand-eyes Idol/Hourglass of Life (one was necessary to beat Dark Elf)
49. Fiend's Hand (destroyed Harpie Lady Sisters)
50. Mask of Darkness (beat Megamorph'd Gemini Elf) + Widespread Ruin