If you want to go to treeshroud forest you need to return from the future and grovyle will ask you to go to treeshroud forest and get a time gear if you want to go there again you need to beat primal dialga and wait until the credits roll . [pokemon mystery dungeon EOT/D
20F + Interior
After you beat the story line there is really no order to the dungeons. So If you haven't try and beat Joy Tower, Wish Cave, and some other forest one with celeby
after the credits roll and ur graduation(spoiler warning if u havnt passed this point), u can revisit anywhere including treeshroud forest. There Pokemon see u arent with grovyle (when grovyle was with u the Pokemon thought he was still a criminal.)and u can befriend a kirlia there.
I haven't played for a while but the only way I remember is making treeko your starter and evolving it , or In the dungeon Mystifying forest or Mystery jungle there should be Grovyle try and befriend it that is how I got Grovyle. Last but not least Grovyle recruiment wonder mail I don't know what the code is but I'll type it down once I find out.Glad I could Help You seeya
Well you don't need a code. just type this password in wonder mail: : X-HY NSM8 6&3& : 2Q&P 520# 7WQ8 : Objective: Rescue Typhlosion on floor 7 of Treeshroud Forest
ghettomon
Lost Wilderness B11F - B17F. Haven't got it? Here's the wondermail: YNP5 Q&%9 HP5+ SWK5 60P0 W1%W
get to the end of mystery forest not mystifying forest i think you have to battle dont know but you can recruit him
99
There is 13f
99
purity forest