warped forge
Inspired by the gameplay of Super Mario Bros. games, when regular-size Mario is hit once, and the mini mushroom (blue) in modern games:
Upon collecting this power-up, Barry is miniaturized to HALF his normal size.
This could more easily allow him to dodge missiles and zappers, going through small spaces where he normally wouldn't fit.
A potential downside to it would be making Barry super weak: like small Mario, if small Barry is hit by anything, he dies immediately. (Not sure if this is a good game mechanic, but there ya go.)
Similarly to when Mario collects a power-up he immediately grows to full size, same thing with Barry: when he collects another power-up or a vehicle box, he grows to his regular full size.
Upgrading the level of this power-up could make it last longer, and/or could make Barry resist some damage, thus retaining his small size for longer.
Suggested names:
miniaturizer
itsy bitsy
Barry berry
…
uneven steeple
ember olive
fresh pier
viscid pecan