I haven't watched the anime since Johto, but didn't they recently re-use a plot involving three Swinub? *checks Bulbapedia* not to mention that they're Dawn's friend's Swinub, so it seems likely.
Difference is those were all stage ones (meaning they only have 1 evo), Swinub is a stage 2, so it will be a while unless it only spends a couple episodes as a Swinub and a couple as a Piloswine.That'll make Swinub the fourth Generation II Pokémon owned by a main character in the DP arc. [After Aipom, Sudowoodo and Gligar.] All of these four Pokémon have relatives in Generation IV. Aipom has already evolved, Gligar will evolve and Sudowoodo evolved from a forth gen Pokémon and cannot evolve again. So that probably means there will be a Mamoswine joining the cast before long.
Not necesarilly I mean they've showcased Piloswine before so they may just make it really quickly to Mamoswine though I do agree it will probaly be long, let's just hope it doesn't become Johto..
Still knowing that the main reason why a Swinub was added just because it can fully evolve means that we have a LONG way till the end of Sinnoh.
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except for squirtle which was his sixth pokemon, he was cut and not intimidatingI figured Gligar's purpose was to evolve. It's the same as Snorunt or Donphan, his sixth is always a pokemon that is seemingly intimidating.