Pokémon Obsidian BattleSystem v1.01

#name Pokémon Obsidian BattleSystem v1.01.py
import random

you = input("What is your pokemon?\n    ")
lvl = int(input("Your " + you + "'s lvl is "))
yourpokemon = 1
if you == 'Pikachu':
    maxhp = 25 + (11 * lvl)
    hp = maxhp
attacker = random.choice(['Pikachu', 'Bulbasaur', 'Lycanrock'])
atkLvl = random.randint(1,99)
attackerhp = 25 + (11 * atkLvl)
print("A wild " + attacker + " has appeared!")
print("Go! " + you + "!")
battleEnd = 0
while not battleEnd:
    if attackerhp <= 0:
        battleEnd = 1
        print(attacker + " has fainted!")
        coins = abs(attackerhp)
        coins = coins * 5
        print("You recieved " + str(coins) + " coins!")
    elif hp <= 0:
        print("Your " + you + " has fainted!")
        yourpokemon -= 1
        if yourpokemon == 0:
          print("You have no pokemon left that can fight!")
          print("You blacked out!")
          battleEnd = 1
    else:
          print("Attacker's " + attacker + " has " + str(attackerhp) + " health. You have " + str(hp) + " HP!")
          a = input("What do you do?\nF(ight) I(tem)\nR(un)   B(ag)\nEnter the letter: ")
          if a == "R":
              print("Ran away safely")
              battleEnd = 1
          else:
              if a == "F":
                  a = input("Enter T for thunderbolt, L for Lightning Flash, S for Shock, A for tackle.\n")
                  if a == "T":
                      print("Pikachu used Thunderbolt!")
                      if attacker == 'Pikachu':
                          print("It was not very effective!")
                          attackerhp -= 3 * lvl
                      elif attacker == "Bulbasaur":
                          print('It was very effective!')
                          attackerhp -= 11 * lvl
                      elif attacker == 'Lycanrock':
                          attackerhp -= 6 * lvl

              if attacker == 'Pikachu':
                 a = random.choice(['T', 'L', 'S', 'A'])
                 if a == "T":
                     if you == 'Pikachu':
                          print("Opposing Pikachu used Thunderbolt!")
                          hp -= 3 * atkLvl
                 if a == "L":
                     print("Opposing Pikachu used Lightning Flash!")
                     print(you + " is blinded!")
                 if a == "S":
                     print("Opposing Pikachu used Shock!")
                     if random.randint(1,2) == 1:
                         print(you + " is paralysed!")
                     hp -= 1 * atkLvl
                 if a == "A":
                     print("Opposing Pikachu used Tackle!")
                     hp -= 2 * atkLvl