Many people have said that Guilmon and all of his digivolutions are only on Digimon World Dawn unless you trade or breed to get one. They are wrong. You have to have access to the digi-area Access Glacier, though.
1. Get the scan data for a Reptiledramon from Access Glacier. 2. Get a DarkTyrannomon. a. Can be found in Process Factory b. Digivolves from a BlackAgumon - Also Process factory, or, if you want one earlier in the game, get the scan data of a Candlemon, degenerate it, then you can digivolve it into a BlackAgumon. (I did option two, also, try and get a scared D. Tyrannomon, so you can get the farm quest if you haven't yet) 3. Get either Reptiledramon or D.Tyrannomon to level 35 with 3000 Dark Exp and 3000 Machine Exp, then DNA Digivolve. 4. You will get a BlackWarGrowlmon. You have a few (recommended) options to think about: a. Get a Diaboromon as well, and get one of them to Level 63 with 25000 Dark Exp and 360 Attack. b. Degenerate it to a Growlmon, and then digivolve it up to Megidramon (cause you need one to get a Gallantmon), then degenerate it again (if you don't want Megidramon) and get a Gallantmon.
I recommend getting a Gallantmon, then getting it to level 68 with 100% Friendship, along with a Darkdramon, who you should get to level 59 with 24000 Dark Exp and 335 Attack, and two ShineGreymons (who you can keep at level 1, I think). First, DNA Digivolve the Darkdramon and ShineGreymon to get a ShineGreymon Ruin Mode, then DNA Digivolve the Gallantmon and 2nd ShineGreymon, and then you get a ShineGreymon Burst Mode.
Lol, a lot of work, but it is useful if you want to get a ShineGreymon Burst Mode on Dusk, and either don't want to, or (like in my case) can't get to, Wi-Fi.
If you want to get Pandamon first get a frigimon and tischundra (you know the brown bear) and put them at level 50+ beast 5000-7000 and apptitude at 50+ and then do the DNA digivovle section in your lab and tah-dah you have Pandamon.....