- Wisel Guard 3
- Wisel Top
- Witch of the Black Forest
- Witch of the Black Rose
- Witty Phantom
- Wood Remains
- Worm Drake
- Wroughtweiler
- X-Head Cannon
- XY-Dragon Cannon
- XYZ-Dragon Cannon
- Y-Dragon Head
- Yamata Dragon
- Yaranzo
- Yata-Garasu
- Yellow Gadget
- Yowie
- Z-Metal Tank
- Zaborg the Thunder Monarch
- Zanki
- Zeman the Ape King
- Zera the Mant
- Zero Gardna
- Zoa