Encounters:
Encounter intro: 230 frames
Outro: 149 frames

25% Nidoran♂: 73 frames
20% Exeggcute: 99 frames
15% Paras: 126 frames
15% Rhyhorn: 96 frames
10% Nidorino: 81 frames
5% Nidorina: 79 frames
5% Venomoth: 79 frames
4% Chansey: 86 frames
1% Tauros: 93 frames (fun fact, I found this before I found the most common slot (nidom) when searching for encounters to framecount)

Average Cry loss: 91.72 frames
Average encounter loss: 471 frames
Chance of encounter: 60/256
Average timeloss to encounters: +110 frames

turnframe: +2 frames
bike 4 tiles: +32 frames
super repel menu: -103 frames

Total timeloss: 144 frames
Total timesave: 103 frames

Average Timeloss: 41 frames
Best Case: -103 Frames
Worst Case: +1113 Frames

No Immunity yolo: 78% to get no encounters, 1.4% chance of 2 encounters (saves 14 frames on average vs immunity yolograss 6s slower worst case).
Yolo immunity grass (2 extra steps): 78% to get no encounters. No chance of 2 encounters.

Basic summary: 78% chance you save about 1.7s, 22% chance you lose 5s, slightly easier menus (if you use poke doll as visual cue).