RT Route w/ Hiker Vs Current No RT Late Brawly Route
Saves
1 Turn on Carvanha: -6 seconds
No Speedtie Turn 2: -1.5 seconds
No rough Skin Dmg: -1.9 seconds per (up to -3.8 if you RT x2)
1 turn on Zubat: -5 seconds
1 less X-Atk Turn on Rival 2: -6 seconds
On Avg one less heal on Rival 2: -5 seconds
Dont Sell RT: -2.5 seconds
Always fight Calvin: -1.5 seconds saved(?)
~ 29.4-31.3 seconds saved

Losses
Teach RT: +14 seconds
Pick up Escape Rope: +1 second (less than 3.5 because you save not buying it)
Avg miss 1 RT: +7 seconds
~ 22 seconds lost

Net: ~7.5-9.5 seconds saved, ~14.5-16.5 seconds if all RT's hit