Gideon, Champion des Rechts

+1: Lege für jede Kreatur, die ein Gegner deiner Wahl kontrolliert, eine Loyalitätsmarke auf Gideon, Champion des Rechts.
0: Bis zum Ende des Zuges wird Gideon, Champion des Rechts, eine Mensch-Soldat-Kreatur mit Stärke und Widerstandskraft gleich der Anzahl an Loyalitätsmarken auf ihm und er erhält Unzerstörbarkeit. Er ist immer noch ein Planeswalker. Verhindere allen Schaden, der ihm in diesem Zug zugefügt würde.
−15: Schicke alle anderen bleibenden Karten ins Exil.

Gideon, campeón de la justicia

+1: Pon un contador de lealtad sobre Gideon, campeón de la justicia por cada criatura que controla el oponente objetivo.
0: Hasta el final del turno, Gideon, campeón de la justicia se convierte en una criatura Soldado Humano con fuerza y resistencia iguales a la cantidad de contadores de lealtad sobre él y gana la habilidad de indestructible. Sigue siendo un planeswalker. Prevén todo el daño que se le fuera a hacer este turno.
−15: Exilia todos los demás permanentes.

Gideon, Champion de la justice

+1 : Mettez un marqueur « loyauté » sur Gideon, Champion de la justice pour chaque créature contrôlée par un adversaire ciblé.
0 : Jusqu'à la fin du tour, Gideon, Champion de la justice devient une créature Humain et Soldat dont la force et l'endurance sont chacune égales au nombre de marqueurs « loyauté » sur lui et il acquiert l'indestructible. Il est toujours un planeswalker. Prévenez toutes les blessures qui devraient lui être infligées ce tour-ci.
-15 : Exilez tous les autres permanents.

Gideon, Campione di Giustizia

+1: Metti un segnalino fedeltà su Gideon, Campione di Giustizia per ogni creatura controllata da un avversario bersaglio.
0: Fino alla fine del turno, Gideon, Campione di Giustizia diventa una creatura Soldato Umano con forza e costituzione pari al numero di segnalini fedeltà su di esso e ha indistruttibile. È ancora un planeswalker. Previeni tutto il danno che gli verrebbe inflitto in questo turno.
−15: Esilia tutti gli altri permanenti.

正義の勇者ギデオン

+1：対戦相手１人を対象とする。正義の勇者ギデオンの上に、そのプレイヤーがコントロールしているクリーチャー１体につき１個の忠誠カウンターを置く。
0：ターン終了時まで、正義の勇者ギデオンは、パワーとタフネスがそれぞれこれの上にある忠誠カウンターの個数に等しい人間・兵士・クリーチャーになり、破壊不能を得る。これはプレインズウォーカーでもある。このターン、これが受けるすべてのダメージを軽減する。
-15：これでないすべてのパーマネントを追放する。

正义斗士基定

+1：目标对手每操控一个生物，便在正义斗士基定上放置一个忠诚指示物。
0：直到回合结束，正义斗士基定成为人类／士兵生物，其力量和防御力各等同于其上的忠诚指示物数量，且获得不灭异能。他仍是鹏洛客。防止本回合中将对他造成的所有伤害。
−15：放逐所有其他永久物。

Gideon, Champion of Justice

[+1]: Put a loyalty counter on Gideon for each creature target opponent controls.
[0]: Until end of turn, Gideon becomes a Human Soldier creature with power and toughness each equal to the number of loyalty counters on him and gains indestructible. He's still a planeswalker. Prevent all damage that would be dealt to him this turn.
[−15]: Exile all other permanents.

Jumpstart 2022

+1: Put a loyalty counter on Gideon, Champion of Justice for each creature target opponent controls.
0: Until end of turn, Gideon, Champion of Justice becomes a Human Soldier creature with power and toughness each equal to the number of loyalty counters on him and gains indestructible. He's still a planeswalker. Prevent all damage that would be dealt to him this turn.
−15: Exile all other permanents.

Commander 2021

Gatecrash

+1: Put a loyalty counter on Gideon, Champion of Justice for each creature target opponent controls.
0: Until end of turn, Gideon, Champion of Justice becomes an indestructible Human Soldier creature with power and toughness each equal to the number of loyalty counters on him. He's still a planeswalker. Prevent all damage that would be dealt to him this turn.
-15: Exile all other permanents.

Gideon, Champion of Justice's power and toughness are set to the number of loyalty counters on him when his second ability resolves. They won't change later in the turn if the number of loyalty counters on him changes.

Gideon, Champion of Justice's second ability causes him to become a creature with the creature types Human and Soldier. He remains a planeswalker with the planeswalker type Gideon. (He also retains any other card types or subtypes he may have had.) Each subtype is correlated to the proper card type: Gideon is just a planeswalker type (not a creature type), and Human and Soldier are just creature types (not planeswalker types).

If Gideon, Champion of Justice becomes a creature due to his second ability, that doesn't count as having a creature enter. Gideon was already on the battlefield; he only changed his types. Abilities that trigger whenever a creature enters won't trigger.

If Gideon, Champion of Justice becomes a creature the same turn he enters, you can't attack with him or use any of his {T} abilities (if he gains any).

If the first ability doesn't resolve (perhaps because the target opponent is an illegal target when the ability tries to resolve), you won't put any additional loyalty counters on Gideon, although the loyalty counter you put on him to activate the ability will remain.

Say you activate Gideon, Champion of Justice's second ability, and then an opponent gains control of him before combat. You may have any of your creatures attack Gideon, Champion of Justice (since he's still a planeswalker). Then Gideon, Champion of Justice may block (since he's a creature). He may block any eligible attacking creature, including one that's attacking him! During combat, he behaves as an attacked planeswalker and/or a blocking creature, as appropriate. For example, he deals combat damage to any creatures he's blocking, but he doesn't deal combat damage to any unblocked creatures that are attacking him.

You put a loyalty counter on Gideon, Champion of Justice as part of the cost of activating the first ability. When that ability resolves, you count the number of creatures controlled by the target opponent and put that many additional loyalty counters on Gideon.

If damage that can't be prevented is dealt to Gideon, Champion of Justice after his second ability has resolved, that damage will have all applicable results: specifically, the damage is marked on Gideon (since he's a creature) and that damage causes that many loyalty counters to be removed from him (since he's a planeswalker). Even though he has indestructible, if Gideon, Champion of Justice has no loyalty counters on him, he's put into his owner's graveyard as a state-based action.