Insta-shield can be activated through the level select menus for both Sonic 1 and 2. In Sonic 1 you go to the level select menu and choose the Sonic 3 shields, while in 2 you go to the level select menu, press 00 in soundtest three times, and select the Sonic 3 shields from a submenu. The Super Peel-Out is also in Sonic CD, because uh... well you know. edit: I might have misread the "either the Insta-Shield or Super Peel-Out" part and if I did, it kinda makes my post pointless. If that did happen I'm sorry lol.