Welcome to the forums!
Just from the first glance, the CoroCoro mew cards are supposed to have the glittery shimmer on the text part or the card as well. It is one of the most recognizable features of the card. Maybe it is the angle of the card in the picture, but I dont see that glittery shine on the text (purple part) of the card.
Although the pictures are not that great, I am generally wary of older cards, specially Japanese old backs, which are super clean and having no issues, specially on the back. Something about the back seems off.
I am leaning towards not genuine, but I hope someone else can clarify it otherwise.
Cheers!
It’s a fake.
You can look to electric and psychic’ symbols. Also the back seems wierd (colors are too fade) but hard to tell with low quality pictures.
Yours / Real :
You can ask better pictures, you will see it better !
Yep, definitely a newer Aliexpress fake. Stay away.