Zapmolcuno

Zapmolcuno was a PokéGod. It was thought to be Articuno, Zapdos and Moltres merged together.

Origin
In the Pokémon Adventures manga(which are not canon), Articuno, Zapdos and Moltres were merged into a single Pokémon. The Japanese name for this creature was Thu-Fi-Zer, but there was no official English name. Fans created the name Zapmolcuno by merging the names of the three Pokémon involved in this process. It was soon speculated that Zapmolcuno could be obtained in the games and later led to rumors about more merged Pokémon.