Mega Meganium
Type: Grass/Fairy
Ability: Triage
Base Stats:
HP: 80
Attack: 102
Defense: 140
Sp. Atk: 83
Sp. Def: 140
Speed: 80
Now learns: Play Rough

Mega Typhlosion
Type: Fire/Ground
Ability: Adaptability
Base Stats:
HP: 78
Attack: 134
Defense: 78
Sp. Atk: 139
Sp. Def: 85
Speed: 120
Now learns: Earth Power

Mega Feraligatr
Type: Water/Dragon
Ability: Sheer Force
Base Stats:
HP: 85
Attack: 145
Defense: 120
Sp. Atk: 89
Sp. Def: 93
Speed: 98
Now learns: Dragon Rush

I know the Johto starters are supposed to be pure-types, but if they were to have secondary types for their Megas, here they are.

Are they good now?