Generation IV had a lot of new Pokemon. A lot (107 to be exact). This page helps to understand and tell more about them.
This set of Pokemon originate from Sinnoh, the fourth region in The World of Pokemon.
SINNOH
Generation IV
387 Turtwig
388 Grotle
389 Torterra
390 Chimchar
391 Monferno
392 Infernape
393 Piplup
394 Prinplup
395 Empoleon
396 Starly
397 Staravia
398 Staraptor
399 Bidoof
400 Bibarel
401 Kricketot
402 Kricketune
403 Shinx
404 Luxio
405 Luxray
406 Budew
407 Roserade
408 Cranidos
409 Rampardos
410 Shieldon
411 Bastiodon
412 Burmy
413 Wormadam
414 Mothim
415 Combee
416 Vespiquen
417 Pachirisu
418 Buizel
419 Floatzel
420 Cherubi
421 Cherrim
422 Shellos
423 Gastrodon
424 Ambipom
425 Drifloon
426 Drifblim
427 Buneary
428 Lopunny
429 Mismagius
430 Honchkrow
431 Glameow
432 Purugly
433 Chingling
434 Stunky
435 Skuntank
436 Bronzor
437 Bronzong
438 Bonsly
439 Mime Jr
440 Happiny
441 Chatot
442 Spiritomb
443 Gible
444 Gabite
445 Garchomp
Xxx Mega Garchomp
446 Munchlax
447 Riolu
448 Lucario
Xxx Mega Lucario
449 Hippopotas
450 Hippowdon
451 Skorupi
452 Drapion
453 Croagunk
454 Toxicroak
455 Carnivine
456 Finneon
457 Lumineon
458 Mantyke
459 Snover
460 Abomasnow
Xxx Mega Abomasnow
461 Weavile
462 Magnezone
463 Lickilicky
464 Rhyperior
465 Tangrowth
466 Electivire
467 Magmortar
468 Togekiss
469 Yanmega
470 Leafeon
471 Glaceon
472 Gliscor
473 Mamoswine
474 Porygon-Z
475 Gallade
476 Probopass
477 Dusknoir
478 Frosslass
479 Rotom
480 Uxie
481 Mesprit
482 Azelf
483 Dialga
484 Palkia
485 Heatran
486 Regigigas
487 Giratina
488 Cresselia
489 Phione
490 Manaphy
491 Darkrai
492 Shaymin
493 Arceus
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