There were six cards to collect overall, with just one included per purchased game, so it would have been very costly at the time of the English language release, back in 2002, to get the entire set
"My 61st card is a tutor target for Trophy Mage, and it's better to have it in my deck so I can find it than not have it at all." That's doubly making your deck worse: you're playing a card you apparently don't even want that often and reducing the chance you draw the cards you want more
Sort Card Type Brock's Lickitung #41Uncommon $3.36 Lickitung #90Common $24.25 Lickitung #48Uncommon $1.78 Lickitung #38Uncommon $1.36 Lickitung #16Rare $38.55 Lickitung #37Uncommon $6.88 Lickitung #91Common $0.49 Lickitung #39Uncommon $0.62 Lickitung #80Common $9.08 Lickitung #66Common $0.38 Lickitung #78Common $0.30 Lickitung #102Common $0.17 Lickitung #152Common $0.28 Lickitung #161Common $0.28 Lickitung #113Common $0.13 Lickitung #138Common $0.16 Lickitung #108Common $0.17 Lickitung #108Common $0.16 Lickitung #52Common $0.16 Lickitung #57Common $0.27 Lickitung #36Common $0.34 Lickitung #22Common $2.32 Lickitung #41Common $0.47 Lickitung #46Common $0.40 Lickitung #73Common $1.99 Lickitung - 053/071 #53Common $0.10 Lickitung - 082/071 #82Art Rare $10.43 Lickitung - 124/162 #124Common $0.15 Lickitung - 180/162 #180Illustration Rare $29.68 Lickitung (Delta Species) #19Rare $2.49 Lickitung (Holo Common) #16Common $0.36 Lickitung (Master Ball Pattern) #108Common $11.42 Lickitung (Poke Ball Pattern) #108Common $0.40 Lickitung #16Rare $38.55 Lickitung - 180/162 #180Illustration Rare $29.68 Lickitung #90Common $24.25 Lickitung (Master Ball Pattern) #108Common $11.42 Lickitung - 082/071 #82Art Rare $10.43 Lickitung #80Common $9.08 Lickitung #37Uncommon $6.88 Brock's Lickitung #41Uncommon $3.36 Lickitung (Delta Species) #19Rare $2.49
Costs five Colorless Energy Cards, but it can be reduced to three if you attach a Future Energy Boost Capsule to Iron Jugulis
And to be fair, that's not entirely on them
