From Sonic Retro

Metal Sonic Kai

As is fairly common knowledge, Metal Sonic Kai (as the regular blue Metal Sonic is called in ChaotixMedia:Chaotix 32X JP manual.pdf[1]) will attack if you leave the game idle for a minute. I don't think this is currently mentioned anywhere on the wiki. It's kind of an easter egg, but since his function is to attack the player, during gameplay, would that make him eligible for his own enemy page? --Pecky (talk) 17:26, 22 July 2019 (EDT)

It's similar to the "I'm outta here" thing in Sonic CD - Sonic the Hedgehog CD/Hidden content. I'd probably do something similar for Chaotix -Black Squirrel (talk) 12:23, 23 July 2019 (EDT)
  1. File:Chaotix 32X JP manual.pdf, page 43