Here are few more entries of the Bikini Challenge:
18. Ancient - Shantae ended wearing an ancient bikini that hypno'd her
19. Malfunction - Peach, her bikini dropped off
20. Stripes - Mona from Waifu Impact
21. Polka dot - With Timerra from Waifu Emblem Engage, tho TBH I'm not fully sure on this one, I MAY redraw it later.
22. Robot - With Jennifer from Disgaea 1 hypnotized into wearing a more metalic/robot like outfit
23. Galaxy - We having one of my waifus from Waifu Flipper err World Flipper, With Belsidia wearing a Galaxy themed bikini

Enjoy!