[KaijuUltraFan]

depends what you mean by best though, right?

Amazon had some cool monsters, the Ant-Queen was neat, 'W' had Taboo who is possibly my most favorite design, (she didn't even have legs and was still awesome), ...'The Next' had Chiharu Kazami who was pretty awesome and reminded me of something from Resident Evil.

some of the early Showa monsters were (imo) pretty memorable just because they were so weird, like Machine Gun Snake, or Guillotine Lizard,..but the costumes themselves weren't usually that great back then even when the idea and design were interesting. I've liked all the monsters in all the series though I guess.

For 'final answer' I think I have to say the Sonozaki Family from 'W'



Taboo is still my favorite monster design (the floating woman with an eyeball where her feet should be.) (these are the toys/figures but it still shows off the designs pretty well.)



the more you see the more weird stuff you notice, like the tiny red person sitting in her hair on top of her head. She's a really neat design. I like how her hair comes down her face and over her eyes and comes to a weird point.

the house-cat the Father is holding becomes that big monster cat.

Kamen Rider W was such an interesting season for a number of different reasons. But Taboo is probably my most favorite monster design I've seen.