Can you actually give it to Pokemon? I thought it was counted as a key item so you wouldn't be able to do that.
There's a glitch in Pokemon Stadium 2 that attaches it to a Pokemon sometimes. I've never done it myself, but I believe it entails trading between two RBY games via Stadium 2 and checking PC Box 14 (because GSC has 14 PC boxes even though RBY only has 12).
so via Emulater,you can obtain TERU-SAMA,and find its hexidemal,and activate the celebi event,just thinking.........
Put simply... no. Teru-Sama and the GS Ball are two different things.
Activating the Celebi event is not possible
at all in Gold and Silver, because it doesn't exist in those games. Activing the Celebi event
is possible in Crystal, but it requires the item GS Ball, not Teru-Sama.