|First Appearance||New Super Mario Bros. NX (Guy's Existing Version)|
|Latest Appearance||New Super Mario Bros. NX (Guy's Existing Version)|
| Koopa Troop|
Rainbas are a cloud-like Goomba subspecies that can drop Rain Clouds that give Mario the Rain Cloud ability. The enemies can summon heavy rain, causing a small wave that pushes Mario back, and can also summon lighting as an offensive move. One can be defeated by stomping it twice. The first stomp causes the Rainba to send out a torrential rain storm.
Toxbas are a Rainba subspecies that have a purple cloud as their head instead of a rain cloud. Toxbas have two small fangs and have poison drool pouring from their mouths. They can drop Poison Flowers that give Mario the Poison ability. Toxbas can shoot poison, and are basically mobile Poison Piranha Plants.
Stormbas are a Rainba subspecies that have a storm cloud as their head instead of a rain cloud. Stormbas also have energy charged teeth shaped like lightning strikes. They can drop Storm Clouds that give Mario the Storm Cloud ability. The enemies are usually fought in pairs, and can summon multiple lightning bolts to strike at a time.
Shaodwbas are a Rainba subspecies that have been injected with Dark Matter, and have a glowing black aura around them. They only appear in castle levels and dark levels. They can shoot multiple dark energy balls and can create tiny, blue Dark Matters. They do not grant any power up when defeated.