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Lumi Master Starcolor & Rainbow Lumi Guide

Written by Updated 28 September 2026

Rainbow and Starcolor get mixed up constantly, and the mix-up costs players real resources. They are two separate things. Rainbow is the top rarity a Lumi can roll, and it is where the stat gain lives. Starcolor is a recolour that only a Rainbow can carry, and the game itself describes it as cosmetic. You chase Rainbows to make a Lumi stronger. You chase Starcolor for the Gallery, for the season's collection rewards, and because it looks good. Keep that split in mind and most of the decisions below become simple.

1. Rainbow is power, Starcolor is a look

Every Lumi you catch rolls a rarity from Green up to Rainbow, and a Rainbow copy carries the highest stats that Lumi can have. That is the version worth levelling for battle. Starcolor changes part of a Rainbow's body colour and nothing else in a fight, so a Starcolor copy of a weak Lumi is still a weak Lumi.

That has a direct consequence for the Arena. If your goal is ranked play, put your materials into strong permanent Lumi such as Floragon or Charigon rather than chasing a special Rainbow from an event. A Rainbow Charigon at Lv. 40 is ready for ranked play; a Starcolor event Lumi that nobody would pick is not.

Where Starcolor does matter is collection. The Gallery tracks it, the season's collection rewards are built on it, and two of the strongest Lumi in the game are unlocked through it, covered in section 5.

2. Finding a Rainbow

The main route has a guarantee built in. After roughly 500 encounters a Rainbow Lumi is certain to appear, and about half of those guaranteed Rainbows are seasonal ones. Rainbow footprints on the path mean one is just ahead, so slow down and make sure you have a good card ready.

Season maps carry their own guarantee: a Rainbow is certain after 499 catches on the season map, counted separately from the main route. Collab maps are the exception. The Peach Cat collab's Sweet Beach has no pity counter at all, though it won't repeat a Rainbow you already own from there until you have all five.

A high compass multiplier helps here too: it raises every reward roll, and group encounters at a high multiplier give you several catches from a single step, so you burn through the encounter count faster. When a group includes a Rainbow, the game catches the others first and gives the Rainbow its own catch screen. That is the moment for your best card and your candy.

For the catch itself, a Legendary Lumi Card with candy is the reliable combination. Save the rarer Starcolor Lumi Cards for the specific Rainbows you want recoloured, which section 3 covers.

3. The two ways to give a Rainbow Starcolor

The first way is to catch it with a Starcolor Lumi Card. The card only works on a Rainbow, and whatever it catches comes out with Starcolor. Free players get very few of these, so spend them only on Rainbows you actually care about: a Lumi you plan to use, or one the season set needs. Starcolor Lens is the crafting material behind the cards.

The second way is to awaken a Rainbow you already own with 10 Prism Mirrors. The Cake Festival's first phase is the main early source of mirrors. Players disagree on how many the first event gave, with counts of 3 and 6 both reported, so plan on the lower number and treat anything more as a bonus.

Prism Mirrors also re-roll the colour of a Starcolor Lumi you already have. The first recolour is random, so if you dislike the result, a mirror fixes it. That means there is no reason to hold back on catching a Starcolor just because you are hoping for a better colour.

Timed expedition maps close during the season, but they reopen before the season ends. If you missed a Rainbow on one of them, you get another chance, so don't panic-spend a card on something mediocre because a map is closing.

5. The two big Starcolor rewards

Pterolux is the prize for completing the Season 1 Starcolor gallery: every Season 1 Starcolor Lumi registered before the season closes. On the field it is one of the hardest hitters in the game, with 110 ATK and a signature that gains Pierce while it is ahead on stages. Whether a free player can finish the set in time is disputed. The shop costs are high and Energy is tight, so start early and do not rely on catching up in the last week.

Otterknight comes from the Starcolor otter quests. Unlocking it takes stellarizing 5 specific Rainbow otters and giving up 10 Season 1 Rainbows, 5 of them Steel, so spare Rainbow otters are never release material. It is immune to status effects, and in an otter team it shares every buff it gains with the otters beside it.

Both unlocks eat Rainbows, which is the strongest argument for never releasing a Rainbow early. Check the Otterknight quest list before you let any Rainbow Steel Lumi go.

6. A free player's order of priorities

Put Rainbows you will fight with first, and level those toward Lv. 40 for ranked play. Next, register every Rainbow you catch in the Gallery before doing anything else with it. Then spend Starcolor Lumi Cards only on season set Lumi and on Lumi you use, and collect Prism Mirrors from every event for awakening. Keep every Rainbow otter and every Season 1 Rainbow Steel Lumi until you know whether you are going for Otterknight. Leave Pterolux as a stretch goal unless you are confident you can finish the set before the season ends.

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