How to shiny hunt Slowbro.

The fastest known Slowbro shiny hunt is Overworld spawn at Seafoam Islands 1f in Let's Go Pikachu — roughly 3.0 hours of active hunting. Every other game and route is ranked below.

Slowbro

50 shiny-huntable encounters

Best huntOverworld spawn

Seafoam Islands 1f

Let's Go Pikachu

3.0 hr

estimated time to shiny

Encounter rate: 100%
Shiny odds: 1/1365
Encounters: 1,365
Level: 39–44

Catch Combo + Lure stacks to roughly 1/273 with the charm.

#23.0 hr

Seafoam Islands 1f

Let's Go Eevee

Method: Overworld spawn
Encounter rate: 100%
Shiny odds: 1/1365

#33.0 hr

Seafoam Islands B1f

Let's Go Pikachu

Method: Overworld spawn
Encounter rate: 100%
Shiny odds: 1/1365

Catch Combo + Lure stacks to roughly 1/273 with the charm.

#43.0 hr

Seafoam Islands B1f

Let's Go Eevee

Method: Overworld spawn
Encounter rate: 100%
Shiny odds: 1/1365

#	Game	Location	Method	Rate	Shiny odds	Encounters	Est. time
1	Let's Go Pikachu	Seafoam Islands 1f	Overworld spawnLv 39–44	100%	1/1365	1,365	3.0 hr
2	Let's Go Eevee	Seafoam Islands 1f	Overworld spawnLv 39–44	100%	1/1365	1,365	3.0 hr
3	Let's Go Pikachu	Seafoam Islands B1f	Overworld spawnLv 39–44	100%	1/1365	1,365	3.0 hr
4	Let's Go Eevee	Seafoam Islands B1f	Overworld spawnLv 39–44	100%	1/1365	1,365	3.0 hr
5	Let's Go Pikachu	Seafoam Islands B2f	Overworld spawnLv 39–44	100%	1/1365	1,365	3.0 hr
6	Let's Go Eevee	Seafoam Islands B2f	Overworld spawnLv 39–44	100%	1/1365	1,365	3.0 hr
7	Let's Go Pikachu	Seafoam Islands B3f	Overworld spawnLv 39–44	100%	1/1365	1,365	3.0 hr
8	Let's Go Eevee	Seafoam Islands B3f	Overworld spawnLv 39–44	100%	1/1365	1,365	3.0 hr
9	Let's Go Pikachu	Seafoam Islands B4f	Overworld spawnLv 39–44	100%	1/1365	1,365	3.0 hr
10	Let's Go Eevee	Seafoam Islands B4f	Overworld spawnLv 39–44	100%	1/1365	1,365	3.0 hr
11	Legends: Z-A	Wild Zone 11 Alpha	Overworld spawnLv 42–44	100%	1/1365	1,365	3.0 hr
12	Sun	Kalae Bay	SOS chaining (31+ chain)Lv 15–18	15%	1/273	1,820	7.1 hr
13	Moon	Kalae Bay	SOS chaining (31+ chain)Lv 15–18	15%	1/273	1,820	7.1 hr
14	Ultra Sun	Kalae Bay	SOS chaining (31+ chain)Lv 15–18	15%	1/273	1,820	7.1 hr
15	Ultra Moon	Kalae Bay	SOS chaining (31+ chain)Lv 15–18	15%	1/273	1,820	7.1 hr
16	Sword: Crown Tundra	Max Lair	Dynamax AdventureLv 65	100%	1/300	300	35.0 hr
17	Shield: Crown Tundra	Max Lair	Dynamax AdventureLv 65	100%	1/300	300	35.0 hr
18	Mega Dimension	Lumiose City — 5 Star (Hyperspace)	Overworld spawnLv 38–40	6.25%	1/1365	21,840	2.0 days
19	Scarlet	Casseroya Lake — Beach Morning	Overworld spawnLv 37–56	5.56%	1/1365	24,550	2.3 days
20	Violet	Casseroya Lake — Beach Morning	Overworld spawnLv 37–56	5.56%	1/1365	24,550	2.3 days
21	Scarlet	Casseroya Lake — River Morning	Overworld spawnLv 37–56	4.76%	1/1365	28,676	2.7 days
22	Violet	Casseroya Lake — River Morning	Overworld spawnLv 37–56	4.35%	1/1365	31,379	2.9 days
23	LeafGreen	Cerulean Cave 1f	SurfingLv 40–55	35%	1/8192	23,406	3.3 days
24	LeafGreen	Cerulean Cave B1f	SurfingLv 50–65	35%	1/8192	23,406	3.3 days
25	Scarlet	Casseroya Lake — Lake Morning	Overworld spawnLv 37–56	2.56%	1/1365	53,320	4.9 days
26	Violet	Casseroya Lake — Lake Morning	Overworld spawnLv 37–56	2.44%	1/1365	55,943	5.2 days
27	LeafGreen	Seafoam Islands B3f	Walking in grassLv 32–34	15%	1/8192	54,613	7.0 days
28	LeafGreen	Seafoam Islands B4f	Walking in grassLv 32–34	15%	1/8192	54,613	7.0 days
29	LeafGreen	Seafoam Islands B2f	Walking in grassLv 32–34	10%	1/8192	81,920	10.4 days
30	HeartGold	Johto Safari Zone Peak Johto Safari Blocks Water Min 5	Walking in grassLv 45	10%	1/8192	81,920	10.4 days
31	SoulSilver	Johto Safari Zone Peak Johto Safari Blocks Water Min 5	Walking in grassLv 45	10%	1/8192	81,920	10.4 days
32	HeartGold	Johto Safari Zone Rocky Beach Johto Safari Blocks Peak Min 3 Safari Blocks: Inactive · Morning, Day, Night Johto Safari Blocks Water Min 5	Walking in grassLv 17–42	10%	1/8192	81,920	10.4 days
33	SoulSilver	Johto Safari Zone Rocky Beach Johto Safari Blocks Peak Min 3 Safari Blocks: Inactive · Morning, Day, Night Johto Safari Blocks Water Min 5	Walking in grassLv 17–42	10%	1/8192	81,920	10.4 days
34	Gold	Slowpoke Well B1f	SurfingLv 20–24	10%	1/8192	81,920	11.4 days
35	Silver	Slowpoke Well B1f	SurfingLv 20–24	10%	1/8192	81,920	11.4 days
36	Crystal	Slowpoke Well B1f	SurfingLv 20–24	10%	1/8192	81,920	11.4 days
37	HeartGold	Slowpoke Well B1f	SurfingLv 15–30	10%	1/8192	81,920	11.4 days
38	SoulSilver	Slowpoke Well B1f	SurfingLv 15–30	10%	1/8192	81,920	11.4 days
39	HeartGold	Seafoam Islands B4f	SurfingLv 35–50	10%	1/8192	81,920	11.4 days
40	SoulSilver	Seafoam Islands B4f	SurfingLv 35–50	10%	1/8192	81,920	11.4 days
41	Mega Dimension	Lumiose City — 4 Star or Higher (Hyperspace)	Overworld spawnLv 37–39	0.8264%	1/1365	165,174	15.3 days
42	LeafGreen	Seafoam Islands B1f	Walking in grassLv 33–35	5%	1/8192	163,840	20.9 days
43	LeafGreen	Cape Brink	Walking in grassLv 37–40	5%	1/8192	163,840	20.9 days
44	LeafGreen	Berry Forest	SurfingLv 35–40	5%	1/8192	163,840	22.8 days
45	LeafGreen	Cape Brink	SurfingLv 35–40	5%	1/8192	163,840	22.8 days
46	Black	Abundant Shrine	Rippling waterLv 35–70	5%	1/8192	163,840	41.7 days
47	White	Abundant Shrine	Rippling waterLv 35–70	5%	1/8192	163,840	41.7 days
48	LeafGreen	Cinnabar Island	Super RodLv 25–35	4%	1/8192	204,800	42.7 days
49	LeafGreen	Seafoam Islands B3f	SurfingLv 35–40	1%	1/8192	819,200	113.8 days
50	LeafGreen	Seafoam Islands B4f	SurfingLv 35–40	1%	1/8192	819,200	113.8 days