They have 9HP.
There is a 0.01% chance for any regular slime to become a rainbow slime.
Moves very slowly and will periodically jump in the player's direction. Will do 3-5 damage upon landing on or coming into contact with the player.
Alternatively, it will stop and glow yellow for a few frames before dashing into the player if they are close enough, also dealing 3-5 damage.
Instead of jumping can it drop through platforms if you are below it.