Originally Posted by Fat herewegoagain
Perhaps I missed this somewhere else, perhaps not -
Why are some moves labeled "illegal" and are they not allowed in all battle formats? (e.g. OU suspect, UU, etc.)
If a Pokemon can't learn a move (example: Kyurem and Icicle Crash), that move will be listed as illegal. All moves not mentioned later in this post can be learned by Pokemon ingame (and thus used in the Hackmons tiers).
Shadowstrike and Paleo Wave are moves exclusive to Pokemon created for Smogon's Create-A-Pokemon Project
. (the abilities Mountaineer, Persistent and Rebound are CAP-exclusive abilities as well.) Magikarp's Revenge is a move created by Zarel specifically for debugging purposes and cannot be learned by any Pokemon. It's designed to have every possible side effect.