The hit rates by booster box are as follows: With the MEGA era, it seems as if The Pokemon Company solidified the overall hit rates, and are comfortable with making small adjustments that promote the card game in Japan
[274] 20062012: Generation IVV, TPCi established Following Ruby and Sapphire , Pokmon Diamond and Pearl were released for the Nintendo DS on 28 September 2006, in Japan [297] and on 22 April 2007, in North America
It seems that the visual design, while creating beautiful and creative frames, is pursuing a different goal from the game design

Sort Rarity Card Type Bulbasaur - 1/25 #1Promo $1.39 Chikorita - 2/25 #2Promo $0.54 Treecko - 3/25 #3Promo $0.42 Turtwig - 4/25 #4Promo $0.57 Snivy - 5/25 #5Promo $0.50 Chespin - 6/25 #6Promo $0.46 Rowlet - 7/25 #7Promo $0.50 Grookey - 8/25 #8Promo $0.37 Charmander - 9/25 #9Promo $0.93 Cyndaquil - 10/25 #10Promo $0.55 Torchic - 11/25 #11Promo $0.55 Chimchar - 12/25 #12Promo $0.43 Tepig - 13/25 #13Promo $0.38 Fennekin - 14/25 #14Promo $0.42 Litten - 15/25 #15Promo $0.42 Scorbunny - 16/25 #16Promo $0.46 Squirtle - 17/25 #17Promo $1.81 Totodile - 18/25 #18Promo $0.75 Mudkip - 19/25 #19Promo $0.85 Piplup - 20/25 #20Promo $1.03 Oshawott - 21/25 #21Promo $0.59 Froakie - 22/25 #22Promo $0.45 Popplio - 23/25 #23Promo $0.51 Sobble - 24/25 #24Promo $0.48 Pikachu - 25/25 #25Promo $4.84 Pikachu - 25/25 #25Promo $4.84 Squirtle - 17/25 #17Promo $1.81 Bulbasaur - 1/25 #1Promo $1.39 Piplup - 20/25 #20Promo $1.03 Charmander - 9/25 #9Promo $0.93 Mudkip - 19/25 #19Promo $0.85 Totodile - 18/25 #18Promo $0.75 Oshawott - 21/25 #21Promo $0.59 Turtwig - 4/25 #4Promo $0.57 Cyndaquil - 10/25 #10Promo $0.55

Finally, both creatures are so synergistic with Three Steps Ahead