Update: Images of the CoroCoro feature have finally surfaced, allowing for additional information to be posted within the card texts. However, due to the nature of their feature, the three Hitmons are still missing some critical information, such as attack costs and attack damages. Hawlucha annd Machamp's translations have been fixed with the addition of the images.
In the last update before the entirety of Rising Fist is revealed by auction sites, CoroCoro's June 2014 issue revealed six additional Fighting-type Pokémon: Machamp, Hitmonlee, Hitmonchan, Hitmontop, Landorus, and Hawlucha. Images of the Rising Fist feature in CoroCoro are currently unavailable, but some of the card text from the pages has been made available online. Most of the card text for Hawlucha, Hitmonchan, Hitmonlee, and Hitmontop is unknown, meaning the card feature was more than likely small and difficult to decipher. If so, all the full details for these cards will be posted once full scans are online. The expansion will be released in Japan June 14, 2014.
Hit Points: 120
Power Cry ちからのさけび
Attach a basic Energy card from your discard pile to 1 of your Benched Pokémon.
Sky Lariat スカイラリアット
Hit Points: 150
Your Active Pokémon's attacks do 20 more damage to your opponent's Active Pokémon (before applying Weakness and Resistance).
Strength Crusher カイリキクラッシャー
The Defending Pokémon's attacks do 40 less damage during your opponent's next turn.
Hit Points: 70
Shining Spirits シャイニングスピリッツ
Don't apply Weakness and Resistance for this Pokémon's attacks.
Flying Press フライングプレス
If your opponent's Active Pokémon is not a Pokémon-EX, this attack does nothing.
retreat cost None
Hit Points: 90
Stretch Kick のびるキック
Choose 1 of your opponent's Benched Pokémon. This attack does XX damage to that Pokémon. (Don't apply Weakness and Resistance for Benched Pokémon.)
Spiral Kick かいてんげり
Hit Points: 90
Bullet Punch バレットパンチ
Flip 2 coins. This attack does XX more damage for each heads.