The funniest glitch that i have seen was on Sonic Adventure Battle 2 on Game cube.
The way of making the glitch happen is to go into the first garden in choa garden you get, but u have have to go as sonic OR shadow for this glitch, go up to the mountain thingo a 'jump' off the cliff. there u will be flying/falling ( you still control the character) in the background of the garden, you can go behind the gardern and even into the karate/race entry. if u return on to the main land (where ur choa walk around) your choa appear underground and seem to be 'drowning' underneath the ground. if u want the glitch undone just exit the garden and every thing will be back to normal. Also i love how you can make omochao as a weopon (picking him up and throwing him enemies, but note u can do this any level any character).
The way of making the glitch happen is to go into the first garden in choa garden you get, but u have have to go as sonic OR shadow for this glitch, go up to the mountain thingo a 'jump' off the cliff. there u will be flying/falling ( you still control the character) in the background of the garden, you can go behind the gardern and even into the karate/race entry. if u return on to the main land (where ur choa walk around) your choa appear underground and seem to be 'drowning' underneath the ground. if u want the glitch undone just exit the garden and every thing will be back to normal. Also i love how you can make omochao as a weopon (picking him up and throwing him enemies, but note u can do this any level any character).