Based on butterflies, Butterdroids have light-grey metallic armor with a pair of big yellow wings. They also have big, wide eyeballs and a small proboscis.
Sonic & Knuckles
Butterdroids first appeared in Sonic & Knuckles and its add-on continuation, Sonic the Hedgehog 3 & Knuckles, where they can be encountered in Mushroom Hill Zone. They slowly fly around in groups of two or three, but will attempt to spiral into the playable characters when they get close. This makes the Butterdroids easy to defeat in most cases, but they usually appear near Sticky Vines that the player can get caught on, making them more of a threat. Regardless, Butterdroids are easily defeated with the Spin Jump.
In the Nintendo 3DS version of Sonic Generations, the Butterdroids reappeared in Mushroom Hill. In this game, their attack patterns remain the same as in the previous game. They can be easily defeated with a Spin Jump or the Homing Attack when they are aligned in chain formations so as to help the player reach higher areas.
- Butterdroids never appeared in an issue of Sonic the Comic. However, it did appear in the 1996 Sonic Holiday Special on at pin-up, along with EggRobo, Sonic and other Mushroom Hill Zone Badniks.
- Butterdroids bear an uncanny resemblance to the Pata-Bata from Sonic the Hedgehog CD.
- The Butterdroid's Japanese name "Tefu-tefu" is a Japanese onomatopoeia for a fluttering noise.