Azumarill

There’s no wrong selection of charged moves for the blue bunny, all of them filling different roles, and all holding value. At its most simple, Ice Beam allows you to fight back against the Grasses. Play Rough allows you to win the mirror against opposing Azumarill (if they’re not running their own Play Rough), and Hydro Pump allows you to fight back against Steel-types which would otherwise resist both of your charged moves. When building your own Azumarill, do some testing to see what works best for you, and don’t be afraid to change it to fit your team!

Alolan Raichu

Alolan Raichu has a number of options for moves, and most of them are solid. Volt Switch is generally preferred over Thunder Shock for its higher damage (and both are better than Spark). For charged moves, Thunder Punch is nice because it provides some speed to make up for Raichu's low bulk, and is thus generally recommended as the primary move (though Wild Charge can also work). As a secondary, Wild Charge, Grass Knot, and Psychic all provide different matchup spreads. Psychic allows it to hit Venusaur for SE, and much of the meta for neutral, Grass Knot can oneshot the Water/Ground-types, and Wild Charge helps consistency against Azumarill and Registeel. Wild Charge and Psychic also help with Altaria.