All of that is front and center in Pokmon TCG Pocket
If the target creature is an illegal target by the time the spell tries to resolve (most likely because it has left the battlefield in response), the spell will not resolve
During your opponent's End Phase, if this card is in your GY: You can place this card on the bottom of the Deck
It's a remarkably familiar card, looking very similar to Pocket's digital interpretation of the character, and despite its age, it doesn't cost a bomb like most modern-era cards
Toothpicks are a great tool in altering, for correcting any mistake you might make you can just scrape off paint and excess paint, as well as masking tape to limit your working area
The right to reject under Section 20 of the Consumer Rights Act does not apply