Stand Out Opal Roka

What does Opal Roka do?

Opal Roka switches between versions in two Stand families. The current official card lists a 10% chance to switch, increasing with the product’s grade; otherwise the Stand stays unchanged. It is not a guaranteed evolution item.

Official Opal effect and grade rule

How to get Opal Roka: growing and mutations

Opal belongs to the Rokakaka mutation system. The official mutation guide says a grown Rokakaka has a 3% chance to mutate. That is the chance of any mutation, not a published 3% chance specifically for Opal. No Opal-specific drop rate or guaranteed number of plants is confirmed.

1. Start at Big Chop’s Garden

   The official gardening location is Big Chop’s Garden. Big Chop is listed as a gardening supplier and guide. Check the shop and your current planting requirements in-game; an exact Opal purchase price is not published.

2. Plant and harvest

   The documented garden quest uses a personal pot, dirt and a seed, followed by growing and harvesting. For Opal, work with Rokakaka plants and inspect the resulting mutation rather than treating an ordinary fruit as Opal.

3. Use the growing-room bonus if available

   All Rokakakas grow 3× faster in the gang base’s Rokakaka Growing Room. This affects growth speed; the source does not say it triples the Opal mutation chance. No absolute growth time is given.

Before using an Opal

• Check that your equipped Stand is one of the four supported versions above. Opal is not the general-purpose Stand-removal fruit.
• Read the fruit’s grade. The official source says grade raises conversion chance, but does not give a grade-by-grade table.
• If the version stays the same, that is an outcome described by the current card. The old statement about losing the Stand is no longer in the official Opal description.
• Ten attempts are not a promise of one conversion. Do not confuse mutation chance while growing with conversion chance when using the fruit.