Perhaps hack an NPC to have more than one sprite and have it change periodically. I actually have no idea. That might work theoretically.
How do I make alternating sprites?
See my answer to the above question.
How do I give animations to characters that did not originally have then?
No idea, could be impossible. It would change the framerects of the text and I'm not sure how well that'd turn out.
How would I make the command TXB (TeXt Big) for giant text in the message box. along with a brother command TXS (TeXT Small) to return the text to normal size.
I don't know if this is possible either. You can go into a certain offset and change the whole mod's text colour, but I don't know if that's what you'd want, and I don't know where the offset is...
How would I make a Text color changing command?
Take it away you two