I was searching both Famicom Yoshi games and they are missing on the website

Maybe it's listed with a slightly different title?

I believe the Japanese version of "Yoshi" is called "Mario & Yoshi."

I found a Chinese Game Boy version at my local pawn shop:


Bought it out of curiosity. The PCB is thin and a little corrosion had damaged the traces, but my brother (CZroe) was able to fix it. Apparently it's not a bootleg. Official games were made as cheaply as possible to compete with bootlegs in that region.
 

Madness , the NTSC version of Yoshi , is... yoshi , the PAL is Mario y Yoshi , and the Jap is Yoshi Egg , im sure that Yoshi's cookie is Yoshi no cookie in japan , i put in "find a game" Yoshi , Yoshi no , Yoshi no cookie , yoshi egg , and nothing

Also the wii ware version is on the website , the fc versions don't

You are spelling Yoshi wrong. It's right here

http://nintendoage.com/index.cfm?...