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The Sludge Mk. 9 was an armor set in Ratchet & Clank: Size Matters. It could be obtained by finding all the pieces scattered across the planets. When the set was complete, every swing of the OmniWrench 10K spread acid on the ground, damaging enemies that it touched.
- Boots found in a secret cave on Ryllus.
- Body Armor found on Kalidon after defeating Mungo.
- Gloves obtained by completing the Skyboard race Master's Challenge on Kalidon.
- Helmet obtained by completing the Nigh Impossible Clank Challenge on Metalis.
- Ratchet & Clank: Size Matters (first appearance)
|Armor Sets and Pieces in Ratchet & Clank: Size Matters|
|Armor Set||Old School Suit||Wildfire Armor||Sludge Mk. 9 Armor||Crystallix Armor||Electroshock Armor||Mega-Bomb Armor||Hyperborean Armor||Chameleon Armor|
|Body Armor||N/A||Body Armor||Body Armor||Body Armor||Body Armor||Body Armor||Body Armor||Body Armor|