How early in the game Emerald can you get these pokemon?

Question

spheal

wailmer

evee

mareep

Answer 1

Spheal is obtained in Shoal cave, which is pretty far in the game.

Wailmer can be found pretty much anywhere after you get surf. Routes 103, 105, 106, 107, 108, 109, 110, 115, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133 & 134, Dewford Town, EverGrande City, Lilycove City, Mossdeep City, Pacifidlog Town, Seafloor Cavern, Shoal Cave, Slateport City (Fish)

Eevee-Can't be obtained in emerald without trading.

Mareep is in the Safari Zone Extention & Altering Cave.

Comments

how long does it take to get to altering cave?

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I believe it's after you defeat the Elite 4, so it's still gonna take too long.

Answer 2

Wailmer is obtained by Surfing or Fishing any most routes.

Spheal is obtained late, in Shoal Cave which is near Mosdeep City.

Mareep is obtained in the Safari Zone after getting the National Dex.

Eevee is not obtained in Emerald i think.