So, for my Sapphire Nuzlocke, I really want an Absol. If I catch an Oddish before then, which should be super easy as it's the most common thing on the route before absol is available, then I either catch an Absol, or a Surskit, which I think is less likely, since it's farther down the list and has 1/4 of the pie, same as Absol is Surskit a harder find than Absol, or are they the same rate? Thanks everyone!
However....
Surskit has a 1% chance of appearing I'm that route which leaves Absol having a measly 8% of being found. Its highly implausible you'll find an Absol in that route in Sapphire. The Pokemon having the highest chance of appearing in route 120 in Sapphire are: Marill with a 15% chance of appearing, Zigzagoon with a 20% chance of appearing, Linoone with a 30% chance of appearing, and Oddish with a 25% of appearing. This really makes it implausible to find an Absol, unless.... There's an optional dupe clause in a Nuzlocke that allows you to search for another Pokémon if the first encounter you get in an area has already been encountered earlier in the game. All these Pokemon I listed appear somewhere before 120 so there's a chance you might have already seen them which allows you to hunt for an Absol in a convenient way.
[image showing where route 120 is located]
Source: https://bulbapedia.bulbagarden.net/wiki/Hoenn_Route_120
Absol is easier to get than Surskit, as Absol has an 8 percent encounter rate, and Surskit has a 1 percent encounter rate. Just be aware you could get a Kecleon, as they have a 1 percent encounter rate too. Source: https://bulbapedia.bulbagarden.net/wiki/Hoenn_Route_120