As long as Ariados is in play, each player must pay an additional Colorless to retreat his or her Active Pokémon. Gluey Slime can't make a player pay more than an additional Colorless to retreat a Pokémon, even if there is more than 1 Ariados in play.
Attacks
20+Spider Force
Flip a coin. If heads, this attack does 20 damage plus 10 more damage. If tails, this attack does 20 damage and the defending Pokémon is now Paralyzed.
How much is Ariados #H3/147 worth?
Right now (November 5, 2026) the going rate for an ungraded Ariados #H3/147 from Aquapolis is about $45.72.
Grading changes the math on this one: a PSA 10 is valued around $2,888.88, roughly 63.2x the raw price, while a PSA 9 sits near $363.71. 436 copies have been graded to date, and 18% of them came back a 10 — worth knowing before you pay grading fees.
These figures come from nightly market-data syncs verified against completed sales. Use the chart above to see the trend before you buy or sell.