Action Replay Code used to find these debug pokemon
Notice: Catching ANY of the following WILL Corrupt your save file.
EDIT: The ONLY one of any of these pokemon I have found you can catch is MissingNo. but it requires you to have an open spot in your party.
Wild Pokemon Modifier press Select for 649 Master Balls (Pokedex ID) and 100 Ultra Balls (Level) Hold R well walking around in grass to encrounter your selected pokemon
94000130 FFFB0000
B2000024 00000000
00018D20 02890001
00018D24 00640002
D0000000 00000000
94000130 FEFF0000
B2000024 00000000
DA000000 00018D26
D7000000 00036B06
D3000000 00000000
B2000024 00000000
DA000000 00018D22
D7000000 00036B04
D3000000 00000000
B2000024 00000000
D9000000 00036B04
C0000000 0000002F
D6000000 00036B04
D2000000 00000000
I also used PokeGen to edit how many master balls I was holding, so I could find all of these pokemon.
MissingNo.
Pokemon ID 650
Pokemon ID 651
Pokemon ID 652 (It has the same sprite has 650 but has an actual name)
Pokemon ID 653 (This one is named Brycen Man and is the gender male)
Pokemon ID 654 (It's a HUGE robot tyranitar named M. V)
Pokemon ID 655 (It's M. V2 how knew there's a V2 the irony)
Pokemon ID 656 (It's full name is Trans. Machine but to me it looks like a Time Machine)
Pokemon ID 657 (It's a pair of female legs named Scene OL and is the gender female)
Pokemon ID 658 (It's name Puppet and I tried this one twice because this is just plain freaky)
Pokemon ID 659 (It had the ability Pressure, no gender, looks like the evolution of Puppet, and I think it's a legendary)
Pokemon ID 660 (It's a child robot? Named F-00 or F-OO I wasn't paying attention because my mind is dead about now)
Pokemon ID 661 (It's named Demon and reminds me of Wario from the Mario series a little bit)
Pokemon ID 662 (I have no clue anymore)
Pokemon ID 663 (It's the other wall I guess)
Pokemon ID 664 (A target maybe?)
Pokemon ID 665
Same as Pokemond ID 664 but is named Set U2
Pokemon ID 666 (Atarget set on the ground?)
Pokemon ID 667-Pokemon ID 679 are all the same set thing
Pokemon ID 680 (Hey look a second UFO)
Pokemon ID 681 (a second Scene OL)
Pokemon ID 682 (the evolution of F-00/F-OO? F-002/F-OO2)
Pokemon ID 683 (finally another trainer)
Pokemon ID 684 (a fancy smeargle named Double 2, there was no Double 1 though...)
Pokemon ID 685 (an actually egg unlike the "Egg" from earlier that had the UFO/UFO 2 sprite)
Pokemon ID 686 (manaphy egg it had the ability Pressure)
Pokemon ID 687-Pokemon ID 709 were all Unknowns with broken names.
Pokemon ID 710-65535
Crashed
If anybody wants a save state for one of the pokemon just ask.
Notice: Catching ANY of the following WILL Corrupt your save file.
EDIT: The ONLY one of any of these pokemon I have found you can catch is MissingNo. but it requires you to have an open spot in your party.
Wild Pokemon Modifier press Select for 649 Master Balls (Pokedex ID) and 100 Ultra Balls (Level) Hold R well walking around in grass to encrounter your selected pokemon
94000130 FFFB0000
B2000024 00000000
00018D20 02890001
00018D24 00640002
D0000000 00000000
94000130 FEFF0000
B2000024 00000000
DA000000 00018D26
D7000000 00036B06
D3000000 00000000
B2000024 00000000
DA000000 00018D22
D7000000 00036B04
D3000000 00000000
B2000024 00000000
D9000000 00036B04
C0000000 0000002F
D6000000 00036B04
D2000000 00000000
I also used PokeGen to edit how many master balls I was holding, so I could find all of these pokemon.
MissingNo.
Pokemon ID 650
Pokemon ID 651
Pokemon ID 652 (It has the same sprite has 650 but has an actual name)
Pokemon ID 653 (This one is named Brycen Man and is the gender male)
Pokemon ID 654 (It's a HUGE robot tyranitar named M. V)
Pokemon ID 655 (It's M. V2 how knew there's a V2 the irony)
Pokemon ID 656 (It's full name is Trans. Machine but to me it looks like a Time Machine)
Pokemon ID 657 (It's a pair of female legs named Scene OL and is the gender female)
Pokemon ID 658 (It's name Puppet and I tried this one twice because this is just plain freaky)
Pokemon ID 659 (It had the ability Pressure, no gender, looks like the evolution of Puppet, and I think it's a legendary)
Pokemon ID 660 (It's a child robot? Named F-00 or F-OO I wasn't paying attention because my mind is dead about now)
Pokemon ID 661 (It's named Demon and reminds me of Wario from the Mario series a little bit)
Pokemon ID 662 (I have no clue anymore)
Pokemon ID 663 (It's the other wall I guess)
Pokemon ID 664 (A target maybe?)
Pokemon ID 665
Same as Pokemond ID 664 but is named Set U2
Pokemon ID 666 (Atarget set on the ground?)
Pokemon ID 667-Pokemon ID 679 are all the same set thing
Pokemon ID 680 (Hey look a second UFO)
Pokemon ID 681 (a second Scene OL)
Pokemon ID 682 (the evolution of F-00/F-OO? F-002/F-OO2)
Pokemon ID 683 (finally another trainer)
Pokemon ID 684 (a fancy smeargle named Double 2, there was no Double 1 though...)
Pokemon ID 685 (an actually egg unlike the "Egg" from earlier that had the UFO/UFO 2 sprite)
Pokemon ID 686 (manaphy egg it had the ability Pressure)
Pokemon ID 687-Pokemon ID 709 were all Unknowns with broken names.
Pokemon ID 710-65535
Crashed
If anybody wants a save state for one of the pokemon just ask.