Here is a full page ad with a collaberation promotion of Moo Town Snacks & Sonic 3D Blast. This likely appeared in game magazines or comic books at the time of the game's release. Mootown snacks are cracker packs of various types meant for lunch boxes or snacking. They featured items…
Two round patches. Notice that the Eggman one says "Professor Robotnik" even though in Japan, he was never supposed to be called that. The Tails is so cute on the second one! Although, a bit cross-eyed.