release the chemtrails
I don't really want to cover such basics as that more so than I want to cover how stuff like this is popularized in a given meta.Trainer Tip #???: Status
There are four different types of status conditions; paralysis, burn, freeze, and poison, all with unique effects. Paralysis effectively reduces a Pokemon's Speed stat to a quarter of what it originally was, except for Pokemon with Quick Feet as their ability where this condition raises Speed by 50%, and prevents said Pokemon from attacking a quarter of the time. However Electric-type Pokemon cannot be paralyzed.
Burn halves damage dealt by a Pokemon's physical moves, except for Pokemon with the Guts Ability, where this condition raises Attack by 50%. Additionally, at the end of each turn, the Pokemon loses 1/8 its maximum HP. Keep in mind Fire-type Pokemon cannot be burned.
Freeze causes a Pokemon to be unable to move, however attacking the afflicted Pokemon with a Fire-type move will remove the freeze status. Freeze additionally has 20% for the afflicted Pokemon to thaw out without external aid. Ice-type Pokemon cannot be frozen.
Poison causes a Pokemon to lose 1/8 of its maximum HP every turn, however if a Pokemon is badly poisoned it will first lose 1/16 of its maximum HP, and lose an additional 1/16 each consecutive turn. However switching out resets the process. A Pokemon with the Poison Heal as its Ability will gradually recover health instead when poisoned. Steel and Poison-type Pokemon are unable to become poisoned.