Alternate Forms

With the exception of the Dimension 23 forms, aliens used off-screen by others do not count, such as Gwen's implied uses of Upgrade, Ripjaws, and XLR8. The Dimension 23 forms count because fuck you I want them to. This is my list. I don't have to justify myself to you. Smh.
Omnitrix Aliens: Species & Planets
Alien 	Alternate Form 	Name
Wildmutt 	Dimension 23 	Dog-Nabbit
Wildmutt 	Ben 10,000 	Wildmutt 10,000
Wildmutt 	Time's End 	Wildmutt
Wildmutt 	The Alan 10 Adventures	Wildmutt
Wildmutt 	Ultimate Form 	Ultimate Wildmutt
Wildmutt 	Enhanced Form 	Enhanced Wildmutt
Four Arms 	Dimension 23 	Handy Man
Four Arms 	Ben 10,000 	Four Arms 10,000
Four Arms 	Gwen 10 (OS and OV) 	N/A
Four Arms 	Time's End 	Four Arms
Four Arms 	The Alan 10 Adventures	Four Arms
Four Arms 	Reboot 	Four Arms
Four Arms 	Omni-Enhanced Form 	Omni-Enhanced Four Arms
Grey Matter 	Dimension 23 	Brainfrog
Grey Matter 	Ken 10 	Grey Matter
Grey Matter 	Gwen 10 (OS and OV) 	N/A
Grey Matter 	Time's End 	Grey Matter
Grey Matter 	The Alan 10 Adventures	Grey Matter
Grey Matter 	Reboot 	Grey Matter
Grey Matter 	Ultimate Form 	Ultimate Albedo
Grey Matter 	Omni-Enhanced Form 	Omni-Enhanced Grey Matter
Grey Matter 	Enhanced Form 	Enhanced Grey Matter
Upgrade 	Dimension 23 	Techno-Bubble
Upgrade 	Time's End 	Upgrade
Upgrade 	The Alan 10 Adventures	Upgrade
Upgrade 	Reboot 	Upgrade
Upgrade 	Upgraded Form 	Upgraded Upgrade
Upgrade 	Enhanced Form 	Enhanced Upgrade
XLR8 	Dimension 23 	Speedyquick
XLR8 	Ben 10,000/Ken 10 	XLR8 10,000/XLR8
XLR8 	Gwen 10 (OS and OV) 	N/A
XLR8 	Time's End 	XLR8
XLR8 	The Alan 10 Adventures	XLR8
XLR8 	Reboot 	XLR8
XLR8 	Omni-Enhanced Form 	Omni-Enhanced XLR8
XLR8 	Upgraded Form 	Upgraded XLR8
XLR8 	Enhanced Form 	Enhanced XLR8
Diamondhead 	Ben 10,000 	Diamondhead 10,000
Diamondhead 	Gwen 10 (OS and OV) 	N/A
Diamondhead 	Time's End 	Diamondhead
Diamondhead 	The Alan 10 Adventures	Diamondhead
Diamondhead 	Reboot 	Diamondhead
Diamondhead 	Omni-Enhanced Form 	Omni-Enhanced Diamondhead
Diamondhead 	Upgraded Form 	Upgraded Diamondhead
Diamondhead 	Enhanced Form 	Enhanced Diamondhead
Diamondhead 	Albedo 	Negative Diamondhead
Diamondhead 	Mad Ben 	Mad Diamondhead
Ripjaws 	Time's End 	Ripjaws
Ripjaws 	The Alan 10 Adventures	Ripjaws
Ripjaws 	Enhanced Form 	Enhanced Ripjaws
Stinkfly (OS)	Dimension 23 	Big Bug
Stinkfly (OS)	Ben 10,000 	Stinkfly 10,000
Stinkfly (OS)	Time's End 	Stinkfly
Stinkfly (OS)	The Alan 10 Adventures	Stinkfly
Stinkfly (OS)	Enhanced Form 	Enhanced Stinkfly
Stinkfly (RB)	Time's End 	Mossquito
Stinkfly (RB)	The Alan 10 Adventures	Mossquito
Stinkfly (RB)	Omni-Enhanced Form 	Omni-Enhanced Stinkfly
Stinkfly (RB)	Enhanced Form 	Enhanced Mossquito
Ghostfreak 	Time's End 	Ghostfreak
Ghostfreak 	The Alan 10 Adventures	Ghostfreak/Pride
Ghostfreak 	Bad Ben 	Bad Ghostfreak
Heatblast 	Dimension 23 	Charcoal Man
Heatblast 	Ben 10,000 	Heatblast 10,000
Heatblast 	Gwen 10 (OS and OV) 	N/A
Heatblast 	Reboot 	Heatblast
Heatblast 	Time's End 	Heatblast
Heatblast 	The Alan 10 Adventures	Heatblast
Heatblast 	Omni-Enhanced Form 	Omni-Enhanced Heatblast
Cannonbolt 	Dimension 23 	Rollaway
Cannonbolt 	Ben 10,000 	Cannonbolt 10,000
Cannonbolt 	Gwen 10 (OS and OV) 	N/A
Cannonbolt 	Reboot 	Cannonbolt
Cannonbolt 	Time's End 	Cannonbolt
Cannonbolt 	The Alan 10 Adventures	Cannonbolt
Cannonbolt 	Ultimate Form 	Cannonbolt
Cannonbolt 	Omni-Enhanced Form 	Omni-Enhanced Cannonbolt
Wildvine 	Ken 10 	Wildvine
Wildvine 	Gwen 10 (OS and OV) 	N/A
Wildvine 	Reboot 	Wildvine
Wildvine 	Time's End 	Wildvine
Wildvine 	The Alan 10 Adventures	Wildvine
Wildvine 	Omni-Enhanced Form 	Omni-Enhanced Wildvine
Wildvine 	Enhanced Form 	Enhanced Wildvine
Wildvine 	Albedo 	Negative Wildvine
Blitzwulf 	Time's End 	Blitzwulf
Blitzwulf 	The Alan 10 Adventures	Blitzwulf
Snare-Oh 	Ben 10,000 	Snare-Oh 10,000
Snare-Oh 	Time's End 	Snare-Oh
Snare-Oh 	The Alan 10 Adventures	Snare-Oh
Snare-Oh 	Benzarro 	Zarro Snare-Oh
Frankenstrike	Dimension 23 	Lightning Volt
Frankenstrike	Time's End 	Frankenstrike
Frankenstrike	The Alan 10 Adventures	Frankenstrike
Frankenstrike	Benzarro 	Zarro Frankenstrike
Upchuck 	Dimension 23 	Vomit Man
Upchuck 	Time's End 	Upchuck
Upchuck 	Mad Ben 	Mad Upchuck
Ditto 	Ken 10 	Ditto
Ditto 	Time's End 	Ditto
Ditto 	The Alan 10 Adventures	Ditto
Eye Guy 	Dimension 23 	Eye Guy 23
Eye Guy 	Time's End 	Eye Guy
Eye Guy 	The Alan 10 Adventures	Eye Guy
Way Big 	Dimension 23 	Giant Manster
Way Big 	Ben 10,000 	Way Big 10,000
Way Big 	Time's End 	Way Big
Way Big 	The Alan 10 Adventures	Way Big
Way Big 	Ultimate Form 	Ultimate Way Big
Way Big 	Albedo 	Evil Way Big
Way Big 	Mad Ben 	Mad Way Big
Spitter 	Ben 10,000/Ken 10 	Spitter 10,000/Spitter
Spitter 	Time's End 	Spitter
Spitter 	The Alan 10 Adventures	Spitter
Buzzshock 	Ben 10,000/Ken 10 	Buzzshock 10,000/Buzzshock
Buzzshock 	Time's End 	Buzzshock
Buzzshock 	Bad Ben 	Bad Buzzshock
Arctiguana 	Dimension 23 	Freezelizard
Arctiguana 	Ben 10,000 	Arctiguana
Arctiguana 	Time's End 	Arctiguana
Arctiguana 	The Alan 10 Adventures	Arctiguana
Arctiguana 	Ultimate Form 	Ultimate Arctiguana
Arctiguana 	Albedo 	Negative Arctiguana
Goop 	Dimension 23 	Muck-A-Muck
Goop 	Time's End 	Goop
Goop 	The Alan 10 Adventures	Goop
Goop 	Albedo 	Negative Goop
Swampfire 	Dimension 23 	Mr. Mucky
Swampfire 	Time's End 	Swampfire
Swampfire 	The Alan 10 Adventures	Swampfire
Swampfire 	Ultimate Form 	Ultimate Swampfire
Swampfire 	Albedo 	Negative Swampfire
Chromastone 	Time's End 	Chromastone
Chromastone 	The Alan 10 Adventures	Chromastone
Chromastone 	Enhanced Form 	Enhanced Chromastone
Big Chill 	Dimension 23 	Freezeghost
Big Chill 	Time's End 	Big Chill
Big Chill 	The Alan 10 Adventures	Big Chill
Big Chill 	Ultimate Form 	Ultimate Big Chill
Big Chill 	Albedo 	Negative Big Chill