Bzzap!

From the Super Mario Wiki

Paper Mario Enemy
Bzzap!
Max HP	3
Attack	6
Defense	0
Location(s)	Forever Forest, Flower Fields
Moves	Sting (6; Poison), Multi-Sting (1)
Tattle	This is a Bzzap!. Bzzaps! are monstrous bees. If they sting you, sometimes you'll be poisoned. They also occasionally call a swarm of small bees to attack you in a cloud. Be careful of those little attackers, because you'll sometimes shrink when stung. They don't have a lot of HP, so take care of 'em as quick as you can.

A Bzzap! is a bee enemy found in Flower Fields in the game Paper Mario. This monster attacks by stinging its enemies. A Bzzap!'s sting will sometimes poison Mario. They usually hide in the trees, when Mario whacks the tree with his current Hammer, the Bzzap! will come out and sting to Mario as a First Strike. Defeating them is easy with the Power Bounce badge, since Bzzap!s only have 3 HP. However, they are considerably strong.

They also appear at the end of Forever Forest in a bee hive. Near the bee hive is an HP Plus Badge. They are off the forest's main path in a second exit. By hitting the tree it's hanging on, Mario can coax the Bzzap!s out of hiding.