let me say some stuff...
for one thing, emerl didn't blow up, even though gerald tried to make it so it would terminate itself, it merely dissapeared and the emeralds broke and fell down.the gizoid is able to copy any move and if gerald cant remove the destructive powers in him and make it so he would really self destruct, his grandson with a lower iq eggman certantly can't completely reprogram him.
we saw the master emerald that knuckles was guarding...but it was shattered to pieces by emerl, and the pieces probably fell from space in millions scattered, (typical, the master emerald is destroyed in like every game, either it's "too powerful and might get into the wrong hands so destroy it knuckles" and guess what poor enchida has to put it back together before the next game? knuckles should REALLY quit and get a job at mc donalds that job sucks, oh or someone destroys it)anyways the gizoid already experienced the emeralds power first hand, and he would be kind like before if he returned. however if gerald didn't limit the gizoids abilities then he would had been more powerful in the final fight, and also he was awakened and if he didn't break the master emerald and simply absorbed it it'd had been able to awaken the true gizoid that could even absorb shadows white demon abilities
(said to be uncopyable, this form happened when he finnaly was convinced maria was really dead and went insane so he searched for all the chaos emeralds and the master emerald and in the white demon form he could destroy the universe by lifting a finger and stop time itself, so he started stealing peoples souls but eventually too many good souls were absorbed and corrupted him in a good way and he dissapeared, souls returned and the emeralds of course scattered and poor knuckles takes the blame but of course knuckles couldnt stop shadow with 7 chaos emeralds as hyper shadow) and the gizoid could make it 10 times as strong however he was stupid enough to destroy it instead...what a waste but he is probably still alive.my point is that many things in that make NO sense.obviously the possibility of sonic beating the gizoid at that time should had been impossible. also the gizoid couldnt be reprogrammed duh.also the gizoid has the same soul as maria(like shadow) and thereason he didn't terminate himself is because he was released as the gizoid and yes he would have if he absorbed the master emerald but he absorbed energy instead, so gerald didn't expect another energy to be absorbed but you thought he blew up, and if he did why rebuild him?dr.eggmans closest invention to emerl was a phi lmfao so there is no way he could had done that.also most shadows are clones(well made) with same soul, heart, memory, etc by dr.eggman somehow.phi was his attempt to build emerl, if he blew up then all the parts would either be broken beond repair, destroyed, or useless...so eggman couldnt had done that lol. also sonic cant do chaos controll, shadow was built as a WEAPON and chaos controll was built into him.also the gizoid would be stronger than that without any emeralds at all, let alone with 6 of them being that weak and only uses moves IT'S SEEN!!!ok i think i overdone this but just make a rewrite with better sound, graphics, and humor.