I just checked and it takes like 14exp to get it to level 2, why?
14,000 for the first level, then 24k and 72k for the next two levels if I remember correctly. It goes up even higher from there. He has less than 10 levels per evolution and this is why it takes so much exp to level him up. He is also a late bloomer which is why I never ended up using him. It just took too long to level him up to a playable level. Unless you are going for a "catch them all" game, I don't even think he is worth catching.