This is a page specifically to update anything and everything Coliseum related in Super Smash Bros 4, from screenshots to official movesets, etc. Some of the content is subject to change depending on what gets updated. Feel free to help out in case I happen to not be around on a certain day (or days) by commenting below. I’ll attempt to update it as soon as I can.
Note that since I just recently decided to upload the images of stages, there are no dates for the ones listed below. There will be dates for more stage images from this point forward.
Game Debut: Fire Emblem: Ankoku Ryuu to Hikari no Tsurugi
Smash Debut: Super Smash Bros 4 (Wii U)
Summary of Coliseum (SmashWiki): is a stage in Super Smash Bros. for Wii U from the Fire Emblem series. The stage uses underground machinery to provide a variety of different platform layouts. Coliseums, also referred to as arenas, are a recurring gameplay element that have appeared in most of the Fire Emblem series. They can optionally be visited by any unit for a small fee, allowing said unit to engage in a one-on-one battle with an unaffiliated unit, receiving double the entry fee in case of a victory. In addition, victory against these units would still count towards a characters EXP totals. However, any units that would fall in the coliseum would be lost forever, as if in a normal battle – as such, the player could potentially allow their units to flee the arena, at the cost of losing money from entering.