I don't get it. It's just two Pokémon put together. It looks cool, but there's nothing original. 4/5.
Um... that's sort of how people sprite around here. It's a big hobbie of many, I would think if this was a Digimon forum, they would be using Digimon sprites instead. It's just going with the theme.
Anyway, it's a good, well put together sprite. Just don't enlarge it too much, and maybe get the forum colours from somebody to make it transparent.