First letter last letter YoYo version

eneme

Equilateral

Light Up FHZ

Zan Navi

Inspire

Uh, echo

Omnicron X

X-Con Pro

Oscillatrix

X-con pro

octave

equilateral

Liopleurodon

North Star

Rextreme

Uhhhhhhh, echo.

ENEME

Equinox

X-Convict

Sorry, no ENEME, Equinox, or Xconvict.
Omnicron