Here we look at a Pokemon that the 4th generation introduced, a Pokemon with a viable movepool and ridiculously high stats, yet is placed in the lowly tier of "UU" because of it's pathetic ability, Slow Start.
Smogonites say that even as a support, Regigigas still disappoints. This, I learned, isn't necessarily true.
@Leftovers (252 HP, 252 SpDef/Def, 6 SpDef/Def) Impish
-Thunder Wave
-Confuse Ray
-Knock Off/Stone Edge/Earthquake/Fire Punch
-Stone Edge/Earthquake/Fire Punch
This is mainly a support Regigigas, meant to annoy your opponent with the dreaded condition of "ParaFusion". In reference towards the final slot in the moveset, these moves are simply for damaging, possibly if Regigigas can make it to five turns. Earthquake is solid, but the immunity from Flying types will leave you helpless. Stone Edge is an all-rounder, but low PP and accuracy leave it not fully reliable. Fire Punch is weaker, but offers accuracy and PP (leave out the Flash Fire possibility). In terms of the third slot, some may feel that Knock Off is unnecessary, and instead use one of the offensive options.
@Leftovers (252 HP, 252 Atk., 4 Sp.Def/Def) Adamant
-Thunder Wave
-Substitute
-Earthquake
-Stone Edge/Fire Punch
If you are bold enough to go for the five turns, then this should be an option. If you can pull off the Substitute, from there, you can Thunder Wave the opponent to slow them down and leave room for stalling, eventually leading up to the end of Slow Start allowing a decent sweep in.
So I am not saying Regigigas is 'good', I am simply saying it is underestimated.
