I'd like to add [[Category:Weapon Reskin]] tags to every relevant item's page in the game:
deadly candy poker, Frozen Great Cleaver, etc.
This category tag would disregard methods of acquisition (crafting up a 4* or randomly from an event prize box are the only methods so far).
It's something that's shown up more and more often in the game. IMO, weapons (any item) that behave the exact same way should be equip-able as costumes over one another...so I can have, say, a spiral soaker over my already wonderfully UVed blitz. But that belongs in the suggestions forum, doesn't it? XD...and being able to do this would kinda be a minor monetary loss for OOO, considering that people can UV roll on reskins. Players would also not particularly feel a need to heat+forge if they could do this. Anyway...
I think this category tag would be a minor but good improvement to wiki.
Other Thoughts:
[[Category:Weapon Reskin]] could go into a [[Category:Item Reskin]] overarching category, which could then have other subcategories as potentially needed in the future, such as [[Category: Helmet Reskin]] and so on.
Most costumes are "reskins" implicitly (both of gear items and each other sometimes) but technically they could use [[Category:Costume Reskin]] tags. Meh, work! Not getting the "solid feels" for this tag type on costumes. Just a footnote mentioning that many costumes are "reskins" in the [[Category:Item Reskins]] category page could temporarily suffice...Costumes just don't count in my head cause they don't have "stats" per say.
Different games use the term "reskin" to mean different things. Spiral Knights has started doing their version of "reskins" as of late. As wiki editors, it's our duty to define "reskin" in terms of only Spiral Knights, based on the materials and postings given to us by Devs with the game's updates.
My Proposal:
In Spiral Knights, a "reskin" is a functional item, with stats, that behaves exactly like another item in the game, considering all stats, attack style, and proc. It merely looks different. This logic ignores individual modifications (unique variants or gear boots, etc.). It can stand on its own, and be UV-rolled with punch.
Thoughts?
Seems like something useful to categorize in this manner, with no real reason I can think of not to. I do think it should be clarified in the category page for these items that while there are plenty of reskins in the game at this point, things like the Obsidian weapons, while they are -nearly- identical to their counterpart weapons (Sentenza, Acheron, Graviton Vortex), the poison effect in itself makes them not qualify as reskins. As you said, they are not -exactly- like their non-event counterparts in terms of utility.