Venusaur and Blastoise both share an evolution into Venutoise. Just to mix it up and add more evolutionary methods.
The form it takes depends on which one has higher liking towards the trainer. :) --- The voices in my head may not be real, but they have some good ideas! <(^_^<)(>^_^)> Official Yarne of the FE: Awakening Board! Bunny monster!!!