Hehe! Join the Caseynardo club! And enjoy some headcanons!

Both are bisexual, but it both took them a while to realize they also like boys as much as girls. Leo was very closest about his bisexuality, his awakening was Captain Ryan. Casey just kinda always instinctively knew he was bi, but just never outright talked about it cause it was not a big deal in his mind. He just thought “That girl is hot. That guy is also hot. Nice.”

They started mutually crushing on one another during their time on the farmhouse, they tried dating during second half of season 3, but Leo was too stressed on everything going to continue dating so they agreed to put their relationship on hold until Shredder is defeated. It wasn’t until after season 5 they started officially dating and became a couple.

Raph is pretty much the reason they got together. He’s the one who encouraged Casey to ask out his brother when Casey was having doubts if Leo likes him back. Raph couldn’t stand to watch another Donnie and April “will they won’t they” situation. He advised Casey to just go for it while also threatening to harm him if he even breaks his brother’s heart.

Casey’s nickname for Leo is “Baby Blue” while Leo calls him his “Hockey Knight”

They would probably get matching tattoos. Henna tattoos specifically.

Casey can play the guitar and has written and sung (very poorly) love songs dedicated to Leo.

Leo has written Casey love poems and haikus, though Casey struggles to understand them cause Leo’s vocabulary is more extensive. Regardless he loves them.

Leo heavily relates to Whatever It Takes but he also enjoys Sera’s Confession.

I can see Donnie liking Stayed Gone and Brighter, I think he’d just enjoy Vox’s songs in general.

Raph would like Out For Love cause I feel that a motive he personally lives by, but also likes rocking out to Gravity.

Mikey definitely gives me the vibe that he’d love Clean It Up for the chaos alone, and any song with Sir Pentious singing in it.

April would love More Than Anything, it reminds her of herself and her dad. 

Casey likes Hell is Forever, and specifically Abel’s part in the song Hear My Hope.

Oh hell yeah. I always headcanon that Raph deep down always wanted to have a family of his own, so if he and Mona couldn't have bio kids, then adopting would be their immediate go-to next option.

If Raphael sparred with Vegeta he would be DEAD. It be better for Raph if he just asked if Vegeta would train him, which Vegeta would deny because it’s not something he does often and thinks Raph would be a waste of his time. I think it would be Bulma who tells Vegeta to give the kid a chance and teach him something, which then Vegeta reluctantly agrees. Raph gets a couple of bruises and maybe a broken rib or two, but it was totally worth it! Vegeta starts to respect Raph a bit after that because the turtle is still standing and not giving up, he’s got Saiyan spirit.

Mona Lisa and Vegeta both come from battle obsessed alien planets so they’d definitely have something to talk about. Also the visual of Mona standing at 6ft towering over Vegeta who’s 5’4”

I saw someone on Tiktok make an awesome music edit to the Turtles and friends fighting to the song How It's Done, but I can also imagine that being a Kunoichi Squad (April, Karai & Shinigami) song.

Takedown could be a distrack song the Turtles sing about Shredder.

They do! Their Uncle Mikey got them into the game and they occasionally play with their dad and uncles or sometimes they just play together.