Meowstic - Male

Meowstic is one of the first Pokemon from Gen 6 to be introduced into Pokemon Go, but its stats aren't particularly strong for PvE. At the time of its release, there have already been various Psychic-type Pokemon that perform better in PvE, making this cat a dex filler at best. 

Best PvE Offensive Moveset

• Confusion is the preferred fast move for offense, benefiting from STAB.
• Sucker Punch lacks STAB and doesn't suit Meowstic's role.
• Psychic benefits from STAB and allows Meowstic to fulfill a Psychic-type role. 
• Thunderbolt, Energy Ball, and Magical Leaf don't suit Meowstic.

Best PvE Defensive Moveset

• Confusion is preferred for defense due to its significantly stronger base power. 
• Magical Leaf is also a strong option, but not quite as strong.
• Sucker Punch is inferior on defense due to its lesser defensive damage output. 
• Psychic benefits from STAB and is the hardest to dodge, but doesn't offer any extra coverage. 
• Thunderbolt is decent on defense, but doesn't cover Meowstic's weaknesses.
• Energy Ball is the slowest charge move, and consequently the easiest to dodge. 

Confusion benefits from STAB to deal significantly more damage than Sucker Punch, though the latter has a niche with its Dark-typing and slightly faster energy generation. 

Meowstic's charge moves are interestingly enough identical stat-wise (90 base power, 55 energy cost, 1.64 DPE), meaning the only difference among them are their typings and coverage. Any combination of Meowstic's charge moves can be viable depending on the format, team composition, and needed coverage. Psychic benefits from STAB and thus hits the hardest against a neutral opponent, but doesn't provide additional coverage. Thunderbolt and Energy Ball offer Electric and Grass coverage respectively, and either or both can be chosen.