get ~520 exp in mt moon AND fight other guy

18 for grimer (1-shot crit, 2-hit after disable)
19 for koffing
19 for pidgeotto (2-shot crit)
*20 for rattata (85% to 1-shot)
20 for bulbasaur (can 2-shot after growl, small chance to 1-shot with crit)
20 for caterpie (57% to 1-shot)
23 for NB #3
23 for ekans (1-shot)
23 for zubat (1-shot)
24 for onix
25 for pidgey (can do 3 with QA)
26 for starmie
26 for machop (easier to 1-shot)
27 for second pidgey
27 for pidgeotto (2 less damage on good defense, 1-shot crit)
28 for ivysaur (can hit into potion range)
28 for voltorb (1-shot thrash)
29 for raichu (bad RB level-up)
30 for venonat (bad RB level-up)
30 for cubone (1-shot on 0 DV)
30 for slowpoke (1-shot)
31 for graveler
32 for gyarados


*depends on exact EXP