Series 6 was first released in 2001(-Scrye CCG Checklist and Price Guide second edition). It seems quite rare in comparison to other booster series of Digi-Battle.
This 54 card set came packaged in blue, purple, and green turquoise pack wrappers.
In these packs, gold stamp cards were 1:7 packs. Holographic cards were 1:3 packs. These holo cards were randomly inserted into series 3 packs. However you could only pull certain holos from certain pack wrappers (more on this later on this page). Please remember more information on specific cards can be found on the Digi-Battle checklist found on the Digi-Battle home page.
Here are the cards found in series 6:

BO-271

BO-272

BO-273

BO-274

BO-275

BO-276

BO-277

BO-278

BO-279

BO-280

BO-281

BO-282

BO-283

BO-284

BO-285

BO-286

BO-287

BO-288

BO-289

[Creepy Mode]
BO-290

BO-291

BO-292

BO-293

BO-294

BO-295

BO-296

BO-297

BO-298

BO-299

BO-300

[with grani]
BO-301

BO-302

BO-303

BO-304

BO-305

BO-306

BO-307

BO-308

BO-309

BO-310

BO-311

BO-312

BO-313

BO-314

BO-315

BO-316

BO-317

BO-318

BO-319

BO-320

BO-321

BO-322

BO-323

BO-324
Holographic versions of each Digimon (not the power option cards) could be found in booster packs. These cards are marked with an “S” in the upper right of the card below the card number. Notice their best attack has 10 more points than their non-holo counterpart.
The holo versions of BO-271 to BO-282 could be pulled from the blue packs.

BO-271S

BO-272S

BO-273S

BO-274S

BO-275S

BO-276S

BO-277S

BO-278S

BO-279S

BO-280S

BO-281S

BO-282S
The holo versions of BO-283 to BO-293 could be pulled from the purple packs.

BO-283S

BO-284S

BO-285S

BO-286S

BO-287S

BO-288S

BO-289S

[Creepy Mode]
B0-290S

BO-291S

BO-292S

BO-293S
The holo versions of BO-294 to BO-304 could be pulled from the green turquoise packs.

BO-294S

BO-295S

BO-296S

BO-297S

BO-298S

BO-299S

BO-300S

[with grani]
BO-301S

BO-302S

BO-303S

BO-304S