Sweet Scent - Chance to have a battle with a random Pokémon from the biome you use it in
Aurora Beam/Ice Beam/ect - Freezes nearby water for a short time. Length and area depends on Pokémon stats
Flash - Useful in dark areas like caves. Brightness and length depends on Pokémon stats
Sing/Sleep Powder - Puts player to sleep. Could be used to pass time when player doesn't have a bed
Bubble Beam/Water Gun/ Hydro Pump - Puts out fire. Depends on move, and stats.
Heal Pulse - Heals a player's health
Might be missing a few that could be possible.