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A small note, that they are not a bundle, but both items are zero coins. The Rainbow Poro is in the guardians section of the store, and the Poro Pride emote is in the emote section. Pick them both up, and check out the other new emotes while you do!
Probably tomorrow. Patch goes live on wednesday, but you download it on tuesday.
Correct. Please see the top of the patch notes for the context.