Gran Colosseum V1.03 changes for speedrunning - most of the stuff that heavily affects the speedrun. 
See all the changes in the documentation

Main changes
•	Physical / Special split
•	Fairy type
•	Trade and stone evolutions at level 40
•	TM’s now infinite use
•	Spread damage multiplier increased from 0.5x to 0.75x (Like later gens)
•	Shadow Pokémon natures instantly viewable

Ability changes
•	Meganium Line		Natural cure
•	Typhlosion Line		Flash fire 
•	Feraligator Line	Intimidate 

Move Changes
•	Lick 				30-20 power     			Paralyse chance 100%
•	Flame wheel 		60-75 Power
•	Rock smash 			40 -60 power                Defense lowering chance 100%

Stat Changes
•	Meganium 		HP 80 – 89
•	Feraligator 	Atk 105 – 118 Spa 79-70

Type Changes
•	Typhlosion              Fire/Ground
•	Feraligatr              Water/Dark

•	Charizard		Fire/Dragon
•	Blastoise		Water/Steel
•	Arbok			Poison/Dark
•	Ninetails		Fire/Fairy
•	Farfetch’d              Fighting/Flying
•	Meganium		Grass/Fairy
•	Furret                  Normal/Ground
•	Noctowl			Psychic/Flying
•	Ledian			Bug/Fighting
•	Ampharos		Electric/Dragon
•	Politoed  		Water/Normal
•	Girafarig		Dark/Psychic
•	Stantler		Normal/Psychic
•	Grovyle/Sceptile	Grass/Dragon
•	Nosepass		Rock/Electric 
•	Masquerane		Bug/Water
•	Milotic			Water/Fairy
•	Swablu			Fairy/Flying
•	Altaria			Dragon/Fairy
•	Banette			Ghost/Normal
•	Volbeat			Bug/Electric
•	Illumise		Bug/Fairy
•	Chimecho		Psychic/Ghost
•	Glalie			Ice/Rock