Instead of portraying the Mirage Studios origin of Splinter being a pet of Hamato Yoshi, this version of Splinter is Hamato Yoshi, after being turned to a rat. In the Japanese dub, his human identity is called Yoshihama Takeshi.
There are roughly one-sh*t billion tropes so PLEASE look through them before adding one. Otherwise add what you like. ADDITION: PLEASE read through the trope description provided before submitting something. It's not a huge deal but too often people submit characters that don't fit just because they misinterpreted the title...
