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MegaTropius - Grass/Flying
It grows a collar of banana leaves (shorter than the leaves on its back) around its upper neck above its fruit, with larger bananas under the collar. Its tail grows long and becomes tipped with yellow spikes.
Stats: 110 HP/80 ATK/100 DEF/90 SAT/100 SDF/80 SPD (+100 stat boost, from 460 to 560)
Ability: Regrowth - In sunny weather, the Pokemon regains 1/12 of its total health every turn.
Seems OP, but consider how low Tropius's stats were in the first place for a single stage Pokemon.
Pic is a good alternate, I suppose, if my appearance idea isn't too good.