I love Shadow the Hedgehog, he's my favourite sonic character!
So, I made a new sibling for him hehehehe >:3
Their origin story is that G.U.N. went behind everyone's backs and made a little edgelord junior. Why, you may ask? Well, in Sonic06, Shadow finds out that eventually, humanity WILL turn on him, in the distant future. Ecco was made for exactly that reason... Well, more or less. One, no one would let research like that go to waste, so obviously they kept it and just waited for a bit so the previous ultimate lifeform situation would blow off and be a bit forgotten. And well, even if you DO have shadow on your side, would YOU not have a plan B, juuuust in case? So yeah, baby Ecco was made to fight shadow in case he snaps and goes destroying the world with chaos powers. My idea is that after the events of Sonic x Shadow generations Shadow wishes to see records of stuff related to him and events of Sonic Adventure 2, buuuut, he finds out that they were moved somewhere without him knowing. Somewhere in the G.U.N. facility where Shadow did not have access or clearance to enter. Obviously, that is mega sus, so Shadow walts in anyway (not like they can stop a super powered hedgehog) and that's how Shadow finds out about his new little sib Ecco :3
Shadow is obviously pissed, being like ''WHAT THE HELL DID YOU ALL DO?'', because they're just repeating the same mess that got him here in the first place. Ecco misinterprets him as an enemy intruder, and does as they were trained to do... and attacks. So Ecco and Shadow fight, and since Ecco is basically A BABY, Ecco looses... Shadow is about to you know, deal the final blow because his emotions are getting better of him at the moment, but stops when he sees that Ecco is just a scared child following orders, and he would be a villain here if he went any further, and he's not like that, he was just angry and take off guard, but he'd never hurt Ecco, it's not their fault. What he does instead is tear a new one to the G.U.N. higher ups, and take Ecco out of the lab with him. Obviously pretending he doesn't like Ecco the whole time, but we all know he does
More random stuff:
-Ecco thinks that Metal Sonic is really cool
-Really likes the Chao that look like Shadow
-They can go super with the chaos emeralds
-Forever neutral face. They could be the happiest on earth, and the best you get is a small smile
-They love the brownies with the colourful candies
-They have a lot more chaos energy than shadow because Ecco is the first prototype of G.U.N.'s making that actually kinda worked...
-Wolf and bat hybrid! (Werebat!!! :3)
-Would bite, and could, and you wouldn't be able to escape because an overpowered child lol
-Mimics Shadow a lot
Also their name is Ecco because they're Shadow's distant echo :3
Rouge the bat is the wine aunt. I imagine Ecco getting a bunch of expensive gifts from her, and Shadow just side eyeing here like 'did she buy all that or did she steal it'
Ecco would break in and hang out at Eggman's base. Eggman grows more and more perplexed each time, but in the end he lets Ecco stay so Sage has someone else to play with. Eggman shoo them off when he has a big plan tho lol. Going like: ''Playdate's over flying rat! I have my next masterplan to execute! If you snitch again, I'm setting the security to shoot you down next time, and no more break in for a month!''