Iron Tail
Secret Power
Dig
Crunch
Maybe add a Citrus Berry too
Hyper Beam?
Mightyena doesn't learn the move crunch in Diamond and Pearl. I think it does in ruby sapphire and emerald.
Keckleon Mightyena Lombre Poocheyana learn the move by themselves!!
I think its Crunch or Dig or Double edge or Earthquake. I can higly recement Mightyena, for your Pokemon team!
The pokemon move. ( It's super effective)
any fighting type move
earthquake
icebeam is super effective
Any rock type move will be 4* effective, or hyper effective against Ho-oh.
Any fire or flying type move will be "super effective"
ghost and bug
its on route 112 after you go to meteor falls on route 114 and then the two magma grunts will move and then you fight maxie with a level 24 mightyena, a level 24 zubat and a level 25 camurupt.
The only way I know of to get a super effective hit on spiritomb is to have a Pokemon use foresight on it and then attack it with a fight type move.