If the creature stops being a creature before Shadow Puppeteers's last ability resolves, it will become red until end of turn in addition to its other colors
The set is awash with flavor, especially with seven cards involving Food
So, lets keep it legal and just enjoy the game with your custom fake card designs
For as annoying as the Reserved List is, its Wizards of the Coasts promise not to reprint any of these cards, ever, that makes them such lucrative long-term holds
If Copy Enchantment somehow enters the battlefield at the same time as another permanent, Copy Enchantment can't become a copy of that permanent
Anyway, you may notice as I did that I have a monocolored deck for each of Magics colors except for blue