Jirachi (N/A) @ Leftovers
EVs: 252 Hp/ 252 Sp.def/ 4 Def
Bold Nature (+Def, -Atk)
- Wish (Support)
- Cosmic Power (Stat boost)
- Psychic/Flash Cannon (S.T.A.B)
- Hiddeh Power Ground/Ice/Fighting Thunderbolt (Coverage)
Since jirachi will be slow, it should work well. If used in a tailwind setting or a sandstorm environment. It can set up quicker in tailwind and the sandstorm will chip away the opponent hp.(unless they carry leftovers) As you raise your defense and heal with wish. Of course Psychic/Flash Cannon For the "S.T.A.B" boost. For hidden Power there are threats "Metagross,Salamence,Drapion, etc" if you pick psychic, be best to have fighting to cover dark types.(Pick what type suit you.) with the defensive boost by cosmic power it will absorb hits.
There are flaws to this setting, depending what are the conditions.
This might not work sometimes. However pulled off it can be very useful. (To annoy your opponent. lol)