There are sneakers covered in glitter and or sequins. If your feet require something other than dress shoes, I know mine do, that's what I'd go with.
Heck, I've seen brides where what I'm talking about with a wedding gown, for the ceremony.
I wouldn't wear anything remotely close to tennis shoes, with or without glitter or sequins. The dress code clearly states no tennis shoes, not worth risking - IMO.