Boss respawn times?

Here is the list on StrategyWiki.
http://strategywiki.org/wiki/MapleStory/...o_spawn.3F
It hasn't been updated for a while though so it doesn't have the spawn times for any of the area bosses including Gumiho (Nine Tails ... Keaton).

Area bosses don't have spawn times in the data... Their spawn (as well as the notice) seem to be controlled server side. It's quite odd. The only one that isn't like this is Snowman, and you may notice he's the only one that doesn't have a blue notice.

About that list, I don't think I edited that in any way? I'm not sure, like you said even if I did it wasn't recent.

Off the top of my head, I believe Bigfoot's spawn time is 11 hours. I'll have to recheck though.