Red and Blue
Oh really? Interesting. Not sure about the other Meltan but no chance that specific one is getting OakedWith every pokemon Ash has caught this generation he's gotten a shirt to go along with it.
As there have been episodes with his his Litten before its Evolution to Torracat, Rowlet, Rockruff before its Evolution to Lycanroc. Poipole is the only one that I'm unsure about