Full Metal77

Best answer as chosen by Asker / Ratings
Unlock all 32 Expert Staff Ghosts, Win 5,000 WFC Ghost races or Play 5,100 Grand Prix Races

pity

The easiest way to unlock the mii outfit b is to unlock the 32 expert staff ghosts on time trial mode.

Here are the times for every staff ghost and the times to unlock expert staff ghosts:

Mushroom Cup:

Luigi Circuit
Normal Staff Ghost Time: 01:29.670
Unlock Time: 01:25.742

Moo Moo Meadows
Normal Staff Ghost Time: 01:37.856
Unlock Time: 01.33.571

Mushroom Gorge
Normal Staff Ghost Time: 02:16.110
Unlock Time: 02.07.755

Toad's Factory
Normal Staff Ghost Time: 02:22.480
Unlock Time: 02.15.681

Flower Cup:

Mario Circuit
Normal Staff Ghost Time: 01:44.777
Unlock Time: 01.39.183

Coconut Mall
Normal Staff Ghost Time: 02:30.764
Unlock Time: 02.24.788

DK's Snowboard Cross
Normal Staff Ghost Time: 02:34.693
Unlock Time: 02.24.725

Wario's Gold Mine
Normal Staff Ghost Time: 02:19.583
Unlock Time: 02.14.932

Star Cup:

Daisy Circuit
Normal Staff Ghost Time: 0:56.822
Unlock Time: 01.48.791

Koopa Cape
Normal Staff Ghost Time: 03:03.022
Unlock Time: 02.54.897

Maple Treeway
Normal Staff Ghost Time: 02:58.633
Unlock Time: 02.50.229

Grumble Volcano
Normal Staff Ghost Time: 02:28.237
Unlock Time: 02.19.524

Special Cup:

Dry Dry Ruins
Normal Staff Ghost Time: 02:30.949
Unlock Time: 02.21.681

Moonview Highway
Normal Staff Ghost Time: 02:16.802
Unlock Time: 02.07.016

Bowser's Castle
Normal Staff Ghost Time: 03:04.836
Unlock Time: 02.55.017

Rainbow Road
Normal Staff Ghost Time: 03:05.895
Unlock Time: 02.59.293

Shell Cup:

GCN Peach Beach
Normal Staff Ghost Time: 01:34.233
Unlock Time: 01.30.698

DS Yoshi Falls
Normal Staff Ghost Time: 01:16.461
Unlock Time: 01.12.901

SNES Ghost Valley 2
Normal Staff Ghost Time: 01:06.595
Unlock Time: 01.03.752

N64 Mario Raceway
Normal Staff Ghost Time: 02:14.799
Unlock Time: 02.07.915

Banana Cup:

N64 Sherbet Land
Normal Staff Ghost Time: 02:48.651
Unlock Time: 02.37.784

GBA Shy Guy Beach
Normal Staff Ghost Time: 01:45.568
Unlock Time: 01.39.255

DS Delfino Square
Normal Staff Ghost Time: 02:41.807
Unlock Time: 02.33.107

GCN Waluigi Stadium
Normal Staff Ghost Time: 02:32.882
Unlock Time: 02.24.645

Leaf Cup:

DS Desert Hills
Normal Staff Ghost Time: 02:10.233
Unlock Time: 02.01.141

GBA Bowser Castle 3
Normal Staff Ghost Time: 02:58.304
Unlock Time: 02.50.637

N64 DK's Jungle Parkway
Normal Staff Ghost Time: 02:58.264
Unlock Time: 02.49.028

GCN Mario Circuit
Normal Staff Ghost Time: 01:59.771
Unlock Time: 01.55.267

Lightning Cup:

SNES Mario Circuit 3
Normal Staff Ghost Time: 01:38.880
Unlock Time: 01.34.828

DS Peach Gardens
Normal Staff Ghost Time: 02:34.894
Unlock Time: 02.29.006

GCN DK Mountain
Normal Staff Ghost Time: 02:57.744
Unlock Time: 02.50.248

N64 Bowser's Castle
Normal Staff Ghost Time: 03:19.323
Unlock Time: 03.06.723

Hope this helps!!!