Is the LEGO Ryo Walker (3886-3) still rare?

Yes, as a 2007 promotional item, this Exo-Force set is considered a collector's piece.

What theme is this LEGO set from?

This set belongs to the Exo-Force theme.

No, this promotional item (3886-3) has 0 pieces.

Name: LEGO Ryo Walker - Duracell 12 pack AA Battery Promotion (3886-3)
Brand: LEGO

Exo-Force

Exo-Force · 2007

Theme · Exo-ForcePieces · 0Set Number · 3886-3Year · 2007

Used

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New / Sealed

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Live on eBay now

Converted from USD at the ECB reference rate — sold comps are US-market sales.

JunkPal AI· resale insightanalyzing sold comps…

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Is the LEGO Ryo Walker (3886-3) still rare?: Yes, as a 2007 promotional item, this Exo-Force set is considered a collector's piece.
What theme is this LEGO set from?: This set belongs to the Exo-Force theme.
Does this set contain any physical building pieces?: No, this promotional item (3886-3) has 0 pieces.