I follow way too many smash streamers on Twitch, and I'm just going to go through who I'm following and see what I can find. A lot of them I don't remember at all how I got around to following them, but I'll see what I can dig up. I'm going off of the small amount of research I'm doing on each of these so forgive me if any info is incorrect.
www.twitch.tv/breadnbuttergames is located in Spokane, WA. I don't know their schedule but they stream PM as well as Smash 4 and Melee. Youtube:
https://www.youtube.com/user/BreadnButterGames
www.twitch.tv/xfawkward streams a weekly PM (exclusive, I believe) tournament apparently each Thursday called The Rodent's Den near the Southern Indiana, Kentucky region. Youtube:
https://www.youtube.com/user/justinfurstenfeld
www.twitch.tv/soonersmashbros is another channel I follow but I don't remember watching anything from them. The profile says they stream each Tuesday for Melee and PM, but there's no past broadcasts. Do what you will with that.
www.twitch.tv/jslo2193 streams the Kansas City PM tournaments Smash @ Pew Pew. He streams friendlies in PM and some other games as well. You can find archives on the KC Smash Bros Youtube page:
https://www.youtube.com/channel/UCNd4TphFwFjmhivkVbGv4SA
www.twitch.tv/eaglesmash seems to do some streams for PM tournaments at Georgia State University. Also plays other smash games and friendlies.
https://www.youtube.com/user/GSUEagleSmash
www.twitch.tv/daltonthelou hosts small, reoccurring PM tournaments called Dip Squad Smash in Katy, Texas. Youtube:
https://www.youtube.com/user/Spazticlou
www.twitch.tv/spacecoyotegaming is located in Saskatoon, Saskatchewan and streams a monthly tournament called Smashkatoon which includes both Melee and PM. Youtube:
https://www.youtube.com/user/SpaceCoyoteGaming
www.twitch.tv/teamtacotv formerly streamed on twitch.tv/thealmightycomosis is another stream located in Saskatchewan that streams weeklies called Taco Thursdays that include Melee and PM. Youtube:
https://www.youtube.com/user/TheAlmightyComosis
www.twitch.tv/getgoodsmash streams from Louisiana Tech. They have a biweekly named Get Good Biweekly. I haven't seen any vods or past broadcasts from this channel since January, though. Youtube:
https://www.youtube.com/channel/UC_OhPT_7DN4utoJ5bFt-lDg/feed
www.twitch.tv/camtendo has a plethora of games he streams, from Melee to FGC. I'm not sure how often PM is streamed compared to the others, but I see them in his archive, so I figured I'd put it on this list. Located in Nebraska. Youtube:
https://www.youtube.com/user/Camtendo
www.twitch.tv/projectmanchester I can't find much info about these guys, but it says they stream Smash 4 and PM every Friday from 7pm-12am GMT. Located in Northwest UK.
www.twitch.tv/gamegeeksiowacity is a store that streams many different games. I don't know any sort of schedule, and PM is just one of the games they stream, with a tournament called Smash League. I believe this is the same tournament that IowaSmash used to stream. Youtube:
https://www.youtube.com/channel/UCWrA9q8KChSoaYNjcmh1QPg/featured
www.twitch.tv/hitboxarena is a venue located in Kinnelon, New Jersey. They stream almost every smash game it seems. Smash 4 may be the most streamed game from what I can tell. Archives at:
https://www.youtube.com/user/SmashTwentyfour
www.twitch.tv/underworldgamez streams tournaments including most Smash games. It seems the games are pretty evenly divided on stream time. Youtube:
https://www.youtube.com/user/underworldgamez/feed
www.twitch.tv/livingstudios located in Virginia hosts CVille Smash Weekly every Monday at 5pm EST which includes Melee and PM. Youtube:
https://www.youtube.com/channel/UCv0IcZkmlReg7zg_qxBfm2w/featured
www.twitch.tv/typohousegames is located in Georgia, and is said to stream a monthly called The Smash RWM. I don't know how much they stream PM, but it seems a decent amount according to the Youtube archive. Youtube:
https://www.youtube.com/channel/UCjI60POez1Z6M9XhTdJ7XlQ
www.twitch.tv/ssbmontreal a pretty active channel that streams PM, Smash 4, and Melee. If I remember correctly, their PM weekly is each Monday. Youtube:
https://www.youtube.com/channel/UCjI60POez1Z6M9XhTdJ7XlQ
www.twitch.tv/nextlevelstreaming streams some of the more well-known tournament series in the Midwest incuding ToastedRavs.
Youtube:
https://www.youtube.com/user/NextLevelStreaming
www.twitch.tv/austinpm located in Austin, Texas. They stream PM every week (Fridays? I can't remember for sure) at a tournament called ATX Weekly. They also were the ones who streamed PM at Forte 2. Youtube:
https://www.youtube.com/user/AustinProjectM
Okay, so I've gone through 40 of the 189 streams I follow on Twitch. I've got waaay more to go and I'll keep editing this post. I've just gotta take a quick break.
Edit: I didn't see the revised stream list until now. Seems a lot of what I have here is available there. I'll see if I can find anymore not in that list.