UPDATE: C-17 / CELL / CHICHI / GARLIC JUNIOR / NYOÏ BO / SON GOHAN
MINOR CORRECTIONS:
- "Jr." has been replaced to "Junior" for "Cell Junior" and "Garlic Junior", to match the official way to write it here - and it doesn't hurt writing it all so that it stands out more visually, especially when having to distinguish Cell and his son(s).
- Switched the order for "Nyoï Bo" so that the Kanzenban version is now featured after versions from the original manga run.
- To keep only one name of version (except for Anime / Manga), the "Nyoï Bo"'s fifth version was changed to mention Dragon Ball Online in the description instead of having both the Kanzenban and Dragon Ball Online mentionned as a name. Mentionning the first appearance as the version's main name and keeping other appearances apart at the end of the description will likely become a constant in the future.
Of particular interest is the case of Chapter 1's Nyoï Bo. Check it out below to see how Toriyama's inconsistancy in color schemes happened perhaps even more often than you noticed!
C-17:

1) Anime / Manga version.
2) Super Dragon Ball Z version. An alternative costume for this video game, one that definately gives a whole other feel to that character, a more feminine side (especially combined with the mid-long hair).
CELL:




1) Anime version.
2) Manga / Kanzenban version. Cell's junctions and articulations on his body (like the "belt") are most often blue, as opposed to purple in the anime. Cell keeps his red eyes for his Perfect Form.
3) Super Butoden &
Super Butoden 2 version. The alternative outfit for those Super NES video games will display a turquoise shade instead of the regular green.
4) Hyper Dimension version. The alternative appearance from this Super NES video game shows Cell being grey.
5) Budokai version. The alternative costume for this game has Cell being blue, with purple articulations, and the yellow surrounding of his face has gone dark blue.
6) Super Dragon Ball Z version. A video game alternative appearance showing a white Cell with purple articulations, his armor and crystals being black. With that, Cell is ready for secret operations in the middle of snowfields!
CHICHI:


1) Anime version.
2) Daizenshuu 65 version. This version appears on one tiny Toriyama artwork for a calendar (characters showing the numbers associated with months). The helmet and shoulder pads are blue, with the main outfit being black, and all lines being orange.
3) Super Dragon Ball Z version. That alternative costume for a video game shows the main clothes as being all black, and the accessories such as the helmet and the gloves are blue, with optionnal white outlines.
GARLIC JUNIOR:


1) Anime version.
2) Tenkaichi Budokai version N°1. There is no version of this game being the exact replica of the anime version. This one wears a white belt, and has more of a dark blue tint, although it can be quite subtle.
3) Tenkaichi Budokai version N°2. Like the first outfit for this game, there is a white belt, and this time the tint tends more towards the green side, making his skin somewhat turquoise.
NYOÏ BO:



1) Anime version.
2) Chapter 1 version. This is quite exceptionnal, but if Toriyama is known for changing color schemes between chapters or when going from full pallette to limited pallette, this change happens right in the middle of the full color section of the very first chapter. The three first panels showing the Nyoï Bo reveal that it's white with a red scabbard and a white rope. Turning the page, and still in the full color section, the Nyoï Bo turns into it's Daizenshuu 5 version.
3) Daizenshuu 2 version. The scabbard is blue for this Toriyama artwork.
4) Daizenshuu 5 version. Orange scabbard this time, still in a Toriyama artwork.
5) Kanzenban version N°1. The first cover of the Kanzenban edition clearly shows this brown color, for a scabbard clearly made of wood! It is also used in
Dragon Ball Online, but with Goku's original blue outfit (as opposed to the first Kanzenban cover). This version is used in the game
Dragon Ball Online.
SON GOHAN:










1+2) Anime version.
3+4) Manga version. Toriyama still had Gohan wearing blue wrists like Goku. Gohan wears white socks, on the contrary of the anime.
5+6) Daizenshuu 199 version. Just for the duration of a title page for chapter 411. This time, Piccolo made Gohan's outfit blue like his wrists.
7+8) Kanzenban version. For all his Piccolo-based outfit, Toriyama used to draw him almost exclusively with a red belt, but blue wrists. Since the Kanzenban, it's all red, possibly to mimic Piccolo's natural red wrists. Gohan still has white socks though, unlike his anime equivalent.
9+10) Super Butoden 2 version. The alternative outfit for this Super NES video game has Gohan wearing purple that is so darkened and desaturated that it kinda looks like brown. The belt and wrists are blue like in the anime (while the regular outfit for the same game shows a red belt and blue wrists like the regular manga version).
11+12) Super Dragon Ball Z version. This video game can turn Gohan's Cell Game clothes into Goku's gi through a simple color switch. Note that one of the pictures here shows what it would be like with Gohan wearing Piccolo's cape at the same time, but he doesn't wear the cape in-game.
13+14) Burst Limit version. The alternative outfit for this game shows a turquoise oufit with red-with-a-subtle-hint-of-purple wrists and belt.