Yes it can. The only way another Pokemon can escape is if it also has shadow tag.
Trapinch and Diglett/Dugtrio are the ones who have it however keep in mind that the Arena Trap ability does not work against flying-types and Pokémon with the Levitate ability.
Latios is still capable of running away even while a Trapinch with its Arena Trap is in the battle because Latios' ability is Levitate which allows it to avoid the effects of Arena Trap since Levitate Pokémon and Flying-type Pokémon cannot be blocked from escaping via the Arena Trap ability.
You don't actually select when to use a hidden ability. Say your opponent tried to run from battle or tried to switch pokemon, the Arena Trap hidden ability would stop them automatically. (If you opponent is a flying type of has the hidden ability "Levitate" then the Arena Trap ability wouldn't work, but it works for all other type and abilities).
well did you have it out in battle? if not it has to be out in battle with latios for arena trap to work. if you did have you trapinch out, then... either arena trap didn't work( witch would be weird) or i don't know. another Pokemon would be wynaut or wabuffet. it has the ability shadow tag and that keeps the Pokemon from escaping. i hope you catch the latios! :) -RR14
dugtrio and digglet
Trapinch and Diglett/Dugtrio are the ones who have it however keep in mind that the Arena Trap ability does not work against flying-types and Pokémon with the Levitate ability.
arena trap-diglett. shadow tag-wobbuffet. block-snorlax
Well, no new Pokemon have Arena Trap, but The Pokemon Dugtrio does and Wobbafett has Shadow Tag, which is the same. There is one Pokemon I believe that has Arena Trap as a Dream World Ability...not sure though. Hope this helps!
get a Pokemon like wobbufet with the ability shadow tag, then you can corner it and capture it. arena trap ability works too
Latios is still capable of running away even while a Trapinch with its Arena Trap is in the battle because Latios' ability is Levitate which allows it to avoid the effects of Arena Trap since Levitate Pokémon and Flying-type Pokémon cannot be blocked from escaping via the Arena Trap ability.
You don't actually select when to use a hidden ability. Say your opponent tried to run from battle or tried to switch pokemon, the Arena Trap hidden ability would stop them automatically. (If you opponent is a flying type of has the hidden ability "Levitate" then the Arena Trap ability wouldn't work, but it works for all other type and abilities).
The best way to stop legendaries from running is make use of moves and abilities that prevent it. Examples are Mean Look for a move and Arena Trap for an ability (Arena Trap won't work on flying types or those with the levitate ability).
Shadow Tag Arena Trap Magnet Pull
Use a Pokemon with a move like "mean look" which prevents foes from escaping. Have a Pokemon with the ability arena trap or shadow tag be sent out first.
well did you have it out in battle? if not it has to be out in battle with latios for arena trap to work. if you did have you trapinch out, then... either arena trap didn't work( witch would be weird) or i don't know. another Pokemon would be wynaut or wabuffet. it has the ability shadow tag and that keeps the Pokemon from escaping. i hope you catch the latios! :) -RR14
dugtrio and digglet
Block and Mean Look both trap Pokémon in battles. Also, a Wynaut's ability (Shadow Tag) prevents the opponent from fleeing.