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Catch 'EM Mode
Catch 'Em Mode can be activated by sending the ball through the right loop twice, lighting up two Catch 'Em arrows, then sending the ball into Sharpedo's mouth. Some Pokémon will only appear when all 3 Catch 'Em arrows are lit, however. Also, there are special Pokémon one can catch in Catch 'Em mode.
Hitting Cyndaquil three times will push it into the Egg Stand and start heating the Egg. Hitting it once more will make the Egg hatch. Afterwards, sending the ball into the Egg stand again will lead to Aerodactyl or Totodile replacing the Egg.
Pokémon Mart/EVO Mode
The Ruby Field shop can be found up the ramp at the top-right of the field. Sending the ball up the ramp once will open the door and grant access for one visit, after which the door will close.
Sending the ball through the left loop three times will make entering the shop activate EVO mode.
Gloom will only evolve into Vileplume on this field, and will only evolve into Bellossom on the Sapphire Field.
Hitting the button in front of Chikorita will start a Razor Leaf that makes the two Linoone poke their heads out. Hitting the Linoone on the left will make a Gulpin appear. Travel Mode will start as soon as three Gulpin are on the field.
The field order is Forest ←→ Volcano ←→ Plains ←→ Ocean ←→ Safari Zone ←→ Cave ←→ Forest. After visiting six areas, the next area will be the Ruins.
The first Bonus Stage focuses on Kecleon. The next stage is a battle against Groudon. After Groudon has been beaten twice, the next bonus stage will be against Rayquaza and it will then be added to the circuit of Bonus Stages.
The Sealeo Bonus Stage can be reached through the help of Whiscash.
More information on the Bonus Stages can be found in the Bonus Stage section of the walkthrough.
There is a Ball Upgrade in plain sight. It can be reached by punching the ball with Makuhita, which changes its stance each time the Linoone on the right is hit. The first two punches will push Nuzleaf back, making a bridge to access the Upgrade on the third time. The Upgrade will occasionally be replaced with an extra ball.
The formation switch, located between Cyndaquil and the Pokémon bumpers, will change the formation of said bumpers. The Chinchou float in place or move around. Sometimes two Chinchou will disappear and sometimes they will be replaced by Lotad or Whiscash.
Areas and Catch 'em Pokémon
These are the Pokémon that can be encountered in through Catch 'em Mode. The Catch 'em Arrow value is the minimal number of Catch 'em arrows that need to be lit to encounter that Pokémon.
The following Pokémon can be found in any area, though there is less than a 1% chance of seeing them:
The following Pokémon can be obtained through other means:
|| Groudon Bonus Stage
|| Rayquaza Bonus Stage
|| Available in the Start slot only when at the Ruins