In the manga, their effects activate when both duelists have one part of the pair in their Extra Decks, while in the TCG, they instead activate if one duelist has both on the same side of the field
I would also like to mention that the main deck has 54 cards

REMOVE ALL ADD ALL Tangela - 1/214 Non-Holo Common - Unlimited Common - Unlimited Lost Thunder NM/M Value: 0.23 Tangela - 1/214 Reverse Holo Common - Unlimited Common - Unlimited Lost Thunder NM/M Value: 0.71 Tangrowth - 2/214 Non-Holo Rare - Unlimited Rare - Unlimited Lost Thunder NM/M Value: 0.24 Tangrowth - 2/214 Reverse Holo Rare - Unlimited Rare - Unlimited Lost Thunder NM/M Value: 0.41 Scyther - 3/214 Non-Holo Common - Unlimited Common - Unlimited Lost Thunder NM/M Value: 0.22 Scyther - 3/214 Reverse Holo Common - Unlimited Common - Unlimited Lost Thunder NM/M Value: 0.47 Pinsir - 4/214 Non-Holo Uncommon - Unlimited Uncommon - Unlimited Lost Thunder NM/M Value: 0.07 Pinsir - 4/214 Reverse Holo Uncommon - Unlimited Uncommon - Unlimited Lost Thunder NM/M Value: 0.36 Chikorita - 5/214 Non-Holo Common - Unlimited Common - Unlimited Lost Thunder NM/M Value: 0.35 Chikorita - 5/214 Reverse Holo Common - Unlimited Common - Unlimited Lost Thunder NM/M Value: 1.01 Chikorita - 6/214 Non-Holo Common - Unlimited Common - Unlimited Lost Thunder NM/M Value: 0.24 Chikorita - 6/214 Reverse Holo Common - Unlimited Common - Unlimited Lost Thunder NM/M Value: 0.93 Bayleef - 7/214 Non-Holo Uncommon - Unlimited Uncommon - Unlimited Lost Thunder NM/M Value: 0.63 Bayleef - 7/214 Reverse Holo Uncommon - Unlimited Uncommon - Unlimited Lost Thunder NM/M Value: 0.83 Meganium - 8/214 Holo Rare Holo - Unlimited Rare Holo - Unlimited Lost Thunder NM/M Value: 4.01 Meganium - 8/214 Reverse Holo Rare Holo - Unlimited Rare Holo - Unlimited Lost Thunder NM/M Value: 4.38 Spinarak - 9/214 Non-Holo Common - Unlimited Common - Unlimited Lost Thunder NM/M Value: 0.12 Spinarak - 9/214 Reverse Holo Common - Unlimited Common - Unlimited Lost Thunder NM/M Value: 0.27 Ariados - 10/214 Non-Holo Uncommon - Unlimited Uncommon - Unlimited Lost Thunder NM/M Value: 0.16 Ariados - 10/214 Reverse Holo Uncommon - Unlimited Uncommon - Unlimited Lost Thunder NM/M Value: 0.33 Hoppip - 11/214 Non-Holo Common - Unlimited Common - Unlimited Lost Thunder NM/M Value: 0.15 Hoppip - 11/214 Reverse Holo Common - Unlimited Common - Unlimited Lost Thunder NM/M Value: 0.32 Hoppip - 12/214 Non-Holo Common - Unlimited Common - Unlimited Lost Thunder NM/M Value: 0.18 Hoppip - 12/214 Reverse Holo Common - Unlimited Common - Unlimited Lost Thunder NM/M Value: 0.41 Skiploom - 13/214 Non-Holo Uncommon - Unlimited Uncommon - Unlimited Lost Thunder NM/M Value: 0.25 Skiploom - 13/214 Reverse Holo Uncommon - Unlimited Uncommon - Unlimited Lost Thunder NM/M Value: 0.45 Jumpluff - 14/214 Holo Rare Holo - Unlimited Rare Holo - Unlimited Lost Thunder NM/M Value: 0.73 Jumpluff - 14/214 Reverse Holo Promo - League Promo Promo - League Promo Lost Thunder NM/M Value: 0.54 Jumpluff - 14/214 Reverse Holo Rare Holo - Unlimited Rare Holo - Unlimited Lost Thunder NM/M Value: 0.84 Pineco - 15/214 Non-Holo Common - Unlimited Common - Unlimited Lost Thunder NM/M Value: 0.15 Pineco - 15/214 Reverse Holo Common - Unlimited Common - Unlimited Lost Thunder NM/M Value: 0.26 Shuckle - 16/214 Non-Holo Uncommon - Unlimited Uncommon - Unlimited Lost Thunder NM/M Value: 0.25 Shuckle - 16/214 Reverse Holo Uncommon - Unlimited Uncommon - Unlimited Lost Thunder NM/M Value: 0.86 Shuckle GX - 17/214 Holo Rare Holo GX - Unlimited Rare Holo GX - Unlimited Lost Thunder NM/M Value: 7.91 Heracross - 18/214 Non-Holo Uncommon - Unlimited Uncommon - Unlimited Lost Thunder NM/M Value: 0.22 Heracross - 18/214 Reverse Holo Uncommon - Unlimited Uncommon - Unlimited Lost Thunder NM/M Value: 0.47

Its a decent card mechanically too, with the Clutch attack, costing 1 Fire Energy, dealing 60 HP of damage and blocking the Defending Pokemon from retreating on the next turn
Therefore I always found it odd when most people say that they never played with the cards
[card]Crowned Ceratok[/card] is another solid way to add evasion to your creatures with counters and once you get your [card]Bloodspore Thrinax[/card] up and running, everything is huge anyways, so let the nude goats run free