Bad EGG

BadEGG

Effects
Similar to Missingno. BadEGG can freeze your game or might become your next ally. BadEGG might also erase your game as well.

Location
BadEGG can be foundin the Johto region as an ordinary egg at first then hatches into another egg (supposed to be Togepi). It may also be encountered as a wild pokemon (the same as Missingno.) In Ruby, Sapphire and Emerald, It can be obtain only as an ordinary egg from the Day Care or in Lavaridge town.

Reason
BadEGG will hatch as an ordinary egg in just a short nick of time. The usual steps needed to hatch is less than 15 steps in the next generation after Gold and Silver. In other games, It can be an ally that first needs a host. Then afterwards, It might learn a few attacks from the host Pokemon after gaining a few levels.