Radical Red Catch Rate Calculator

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Radical Red Catch Rate Calculator

Optimize your captures in the ultimate difficulty ROM hack

(e.g., Legendaries = 3, Pidgey = 255)
None Sleep / Freeze Paralysis / Poison / Burn
Poké Ball / Premier Ball (1x) Great Ball (1.5x) Ultra Ball (2x) Dusk Ball (Night/Cave) (3x) Net Ball (Bug/Water Type) (3.5x) Repeat Ball (Already Caught) (3.5x) Timer Ball (Turn 10+) (4x) Quick Ball (Turn 1) (5x) Beast Ball (Non-UB) (0.1x) Beast Ball (Ultra Beast) (5x) Master Ball (100%)
0%
Average number of balls required: 0

How the Radical Red Catch Rate is Calculated

Radical Red utilizes the standard Pokémon capture formula found in Generation 8, but with adjustments to the difficulty spikes common in ROM hacks. The "a" value is the core of the calculation:

a = ((3 * MaxHP – 2 * CurrHP) * Rate * BallMod) / (3 * MaxHP) * StatusMod

Tips for Successful Captures in Radical Red:

  • False Swipe is Mandatory: Since Radical Red enemies are stronger, getting them to 1 HP is crucial for rare encounters.
  • Status Matters: Sleep and Freeze provide a 2.5x multiplier, significantly higher than the 1.5x provided by Paralysis or Burn.
  • DexNav Advantage: Use the DexNav to find Pokémon with hidden abilities, which often have specific catch rates based on their rarity.
  • Level Caps: Remember that in Radical Red, you cannot catch Pokémon that are significantly higher level than your current cap in some versions.

Example Calculation:

If you are trying to catch a Mewtwo (Base Rate: 3) in Radical Red:

  • Max HP: 200, Current HP: 1
  • Status: Sleep (2.5x)
  • Ball: Dusk Ball (3x)
  • Result: Approx 11.2% chance per throw. You would need roughly 9 Dusk Balls on average.
function calculateCatchRate() { var maxHP = parseFloat(document.getElementById('maxHP').value); var currHP = parseFloat(document.getElementById('currHP').value); var baseRate = parseFloat(document.getElementById('baseRate').value); var statusMod = parseFloat(document.getElementById('statusMod').value); var ballMod = parseFloat(document.getElementById('ballMod').value); var resultDiv = document.getElementById('catchResult'); var percentageText = document.getElementById('percentageText'); var avgBallsText = document.getElementById('avgBalls'); if (isNaN(maxHP) || isNaN(currHP) || isNaN(baseRate) || maxHP <= 0 || currHP maxHP) { alert("Current HP cannot be greater than Max HP."); return; } if (ballMod >= 255) { percentageText.innerHTML = "100%"; avgBallsText.innerHTML = "1 (Guaranteed)"; resultDiv.style.display = "block"; resultDiv.style.borderColor = "#27ae60"; percentageText.style.color = "#27ae60"; return; } // Capture Formula: a = ((3 * HPmax – 2 * HPcurr) * rate * ball) / (3 * HPmax) * status var a = (((3 * maxHP – 2 * currHP) * baseRate * ballMod) / (3 * maxHP)) * statusMod; var catchProb; if (a >= 255) { catchProb = 100; } else { // Probability of success based on shake checks // Simplified for UI: Probability = (a/255)^0.75 is a common estimation for modern games, // but the actual "a" value relative to 255 is the standard capture chance indicator. // In RR, many users prefer the raw 'a' percentage for simplicity. var b = 65536 / Math.pow((255 / a), 0.25); var probPerShake = b / 65536; catchProb = Math.pow(probPerShake, 4) * 100; // Safety check for display if (catchProb > 100) catchProb = 100; if (catchProb 50) { resultDiv.style.borderColor = "#27ae60"; percentageText.style.color = "#27ae60"; } else if (catchProb > 15) { resultDiv.style.borderColor = "#f39c12"; percentageText.style.color = "#f39c12"; } else { resultDiv.style.borderColor = "#e74c3c"; percentageText.style.color = "#e74c3c"; } }

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