Something happens overnight where five Auto-ponies get their Cutie Marks Swapped and memories altered but unable to do the talent that the cutiemarks give them. Bumblebee notices this and has to perform the spell that Twilight Sparkle completed all those years ago but for now, investigating the situation as he watches his friends in distress.
Sideswipe: These lab experiments don't make sense, not one little bit. If I miss a step and the potion explodes all over the place. It's up to me to get it right, 'cause plainly you can see It's got to be my destiny, and it's what my cutie mark is telling me
Wheeljack: I try to use these weapons and get the perfect shot. But no matter what I try, I always miss the target. I have to keep on practicing, it's important for my job. It's got to be my destiny, and it's what my cutie mark is telling me
Arcee: I don't care much for lifting weights and watching out for enemies. No matter what I try, I can't fend the ponies off in time. I've got so many jobs to do, it's no fun being me But it has to be my destiny, 'cause it's what my cutie mark is telling me
Ironhide: Lookie here I think I got the right dose? I know it probably doesn't look correct, the patients are at my hooves. I could just collapse from so much distress. Could y'all give me a hand here and help me not kill these patients? My destiny is not pretty, but it's what my cutie mark is tellin' me
Ratchet: I'm suppose to go on these missions that capture the enemy. But I just make a fool of myself and end up hurting myself. I have to keep on trying, for everyone can see
Ratchet and Sideswipe: It's got to be
Wheeljack: It's got to be
Arcee: My destiny
Ironhide: My destiny
All: And it's what my cutie mark It's what my cutie mark Yes, it's what my cutie mark is telling me!
Base reposted by YazToonz2020 on DA here; https://www.deviantart.com/yaztoonz2020/art/MLP-Base-Is-What-My-Cutie-Mark-Is-Telling-Me-765408315