Pokémon - ZA WARUDO!

Have to agree with you on that. I've seen so many really clever and nice ideas for Mega Evos on DA for example, such as:

(Apology for the large image sizes.)

Stand: Arms of an Angel
Stand User: Mega Marowak
Destructive Power: A
Speed: D
Range: C
Durability: B
Precision: B
Developmental Potential: D
Abilities: Allows its user to gain stats and abilities that would ordinarily be impossible to achieve.