do you mean the Wii or DS version. The strategies for the final bosses are different.
(this isn't a real answer, this is gathering information to be able to provide a valid answer)
Sorry, but the Egg Nega-Wisp is the real Final Boss.
Only in the DS version, they are needed to fight the Nega Mother Wisp.
the reason why wisps are in sonic colors are because if you listen to the story eggman tries kidnapping them to turn them into nega wisps. the other reason they are there is because so then sonic can use them for help like rocket.
sonic turns into a powerfull laser that totaly destroys eggmans nega wisp macine
(Non-Static Version) SONIc! Sonic can you hear me? EGGMAN IS usING NEGA-WIsps to make that thing more POWERFUL. CAREFUL HE'S gonna try to kill you! (Static Version) Soni... Eggman is ...ing Nega-Wi... powerful... Careful He's...
If you're askin bout in wich place is, then I think It's space xD But anyway, It's easy, just collect all of the emeralds an finish the game. After that, watch the boring credits and after that the game will restart and then, you can access to the mother nega wisp level wich is in the top of the map
No, Dr. Eggman is the ancestor of Eggman Nega, as revealed in the Sonic Rivals series. Dr. Eggman Nega despises him due to his constant failures when facing Sonic the Hedgehog, scarring his family name.
yes you have to get all the cheose emeralds and beat the game keeping a certain amount of rings i think its 250
Dr Eggman Nega appears in Sonic Rush Adventure and Sonic Rush 3, he is more crazy and insane and looks slightly different than Dr. Eggman.
Not sure but maybe.
Nega Eggman was an alternate reality version of Dr Eggman in the Sonic Rush series. The "Nega" version looked exactly like the original character but had different colored hair, skin and clothes. This idea was borrowed in Scott Pilgrim.
His name is Captain Whisker, and was created by Dr.Eggman and Eggman Nega.