Yoshis are fungible, Toads are fungible *unless* we are speaking about *the* Toad who is the boyfriend of Toadette and some sort of... friends with Peach? Vizier to Peach?
I am not convinced there's a non-fungible specific Yoshi.
Do you think of Yoshi as a singular character, Mario's old friend, or do you think of Yoshi as just a species of animal, of which Mario has encountered thousands of? Don't try to logic it in your head, what does your heart say?
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a pixel art of a frog standing on a ledge overlooking a body of water
ALT: a pixel art of a frog standing on a ledge overlooking a body of water