Treecko

Overgrow — When Treecko is dealt damage, put
a reach counter on it if it doesn't have one
already.
As long as Treecko has a reach counter, it gains
+0/+1.
Evolving — Grovyle (You may cast a creature
named Grovyle by sacrificing this creature and
paying the difference in mana costs. Mana cost
includes color.)